120 mm mortars nyob rau hauv tsab ntawv tsa suab

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120 mm mortars nyob rau hauv tsab ntawv tsa suab
120 mm mortars nyob rau hauv tsab ntawv tsa suab

Video: 120 mm mortars nyob rau hauv tsab ntawv tsa suab

Video: 120 mm mortars nyob rau hauv tsab ntawv tsa suab
Video: New Russian TOS 2 Thermobaric Shocked The World 2024, Kaum ib hlis
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120 mm mortars nyob rau hauv tsab ntawv tsa suab
120 mm mortars nyob rau hauv tsab ntawv tsa suab
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Scandinavian trio

BAE Systems Hagglunds tau tsim 120mm ob -barreled mortar Mjolner (hauv Norse mythology - rauj ntawm tus vaj tswv ntawm xob quaj Thor), teeb tsa ntawm CV90 taug qab lub chassis. Thaum lub Cuaj Hlis 2019, thawj plaub lub tsheb tsim tau raug xa mus rau cov tub rog Swedish. Cov neeg ua haujlwm los ntawm Skaraborg Regiment tam sim pib kawm thiab ua kev sim tua hluav taws thaum Lub Kaum Ob Hlis. Qhov $ 68 lab daim ntawv cog lus rau kev muab 40 Mjolner systems tau txais txiaj ntsig thaum Lub Kaum Ob Hlis 2016. Thawj plaub chav ua ntej tsim khoom tau xa hauv Lub Ob Hlis 2019 tshwj xeeb rau kev qhia. Kev xa khoom yuav ua nyob rau hauv plaub pawg tsheb txhua ob lub hlis.

Cov tub rog Swedish cov tub rog siv tshuab, nruab nrog CV90 cov tub rog sib tua tsheb, tam sim no vam khom rau xyoo 1941 Tampella Grk m / 41 120mm mortars, uas tau thauj hauv lub tsheb thauj khoom thiab tshem tawm los ntawm nws rau kev tua. Cov tub rog thaum xub thawj xav yuav 120mm AMOS (Advanced Mortar System) mortar complexes thiab rau txoj haujlwm no xaj 40 CV90 hulls tshiab hauv 2003. Txawm li cas los xij, xyoo 2008, vim kev txiav nyiaj txiag, Sweden tau tso tseg cov phiaj xwm yuav AMOS, tom qab uas lub hulls tau xa mus rau qhov chaw cia khoom. Cov tub rog Swedish tau tshuaj xyuas nyob rau xyoo 2011 uas tau lees paub tias tus kheej-propelled 120mm mortar mounted on a CV90 platform will provide the best combination of firepower, mobility and tiv thaiv, thiab tseem yuav txo lub sij hawm npaj rau qhib hluav taws thiab tshem tawm los ntawm ib tug tua txoj hauj lwm. piv rau towed system.

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Ob rab phom muzzle-loading Mjolner mortars tau ua haujlwm los ntawm cov neeg coob ntawm plaub: tus thawj coj nrog lub luag haujlwm ntawm rab phom, ob tus neeg nqa khoom thiab tus tsav tsheb. Cov cuab yeej siv riam phom tuaj yeem tig rau pem hauv ntej ntawm 60 °, thaum ntxiv rau lub kaum ntawm qhov hluav taws kub tau muab los ntawm kev tig lub tsheb. Kev thauj khoom lub kaum sab xis ntawm lub kaw lus yog los ntawm 45 ° txog 85 °, tom qab tua ntawm lub kaum sab xis sib txawv, lub thoob thaiv yuav tsum raug coj mus rau lub kaum sab xis. Lub tsev muaj 56 lub mos txwv nyob ib puag ncig. Tus neeg nqa khoom tso lub koob txhaj tshuaj rau ntawm lub tais tau txais, tom qab ntawd cov tshuab siv tshuab pub nws mus rau tom ntej thiab coj nws tawm ntawm qhov chaw sib ntaus, qhov uas kuv tau ua kom haum nrog lub axis ntawm lub tog raj kheej thiab tom qab ntawd poob rau hauv rab phom hauv qab nws tus kheej qhov hnyav. Mjolner tuaj yeem tua thawj plaub lub mines hauv 6 vib nas this, ua tiav qhov siab tshaj plaws ntawm cov hluav taws ntawm 16 puag ncig ib feeb thiab txhawb nqa qhov hluav taws kub ntawm rau ib puag ncig ib feeb. Mjolner txoj kab tuaj yeem tua hluav taws tag nrho 120-mm siab tawg tawg pa taws thiab teeb pom kev zoo muaj rau cov tub rog Swedish, nrog rau Strix tiv thaiv lub ru tsev rau kev tawm tsam los ntawm sab saud los ntawm Saab Dynamics.

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Txhua ntawm tsib tus neeg ua haujlwm sib ntaus sib tua yuav tau txais yim Mjolner txoj hauv kev los ua ob lub platoons. Txhua qhov kev siv riam phom yuav siv los ntawm BAE Systems Hagglunds 'Bv206 taug qab SUV, uas yuav nqa cov mos txwv ntxiv. Cov tub rog yuav tuaj yeem npaj thiab qhib hluav taws hauv li ob feeb, piv rau 10 feeb nws yuav siv sijhawm rau cov tub rog nrog Grk m / 41 mortars, thiab tawm ntawm txoj haujlwm tsis pub dhau ib feeb ntawm kev ua tiav txoj haujlwm.

Mjolner ntauwd kuj tseem tuaj yeem teeb tsa ntawm AMV (Armored Modular Vehicle) 8x8 ntawm Finnish lub tuam txhab Patria Cov Tsheb lossis ntawm cov tsheb sib tw taug qab lossis log tsheb rau cov neeg siv khoom txawv teb chaws.

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Finnish ntxaib

AMOS 120mm cug tau tsim los ntawm Patria Hagglunds, kev sib koom ua ke ntawm Patria Land Systems thiab BAE Systems Hagglunds, tsim nyob rau lub Rau Hli 1996. Thawj yog lub luag haujlwm rau lub pej thuam, thiab qhov thib ob ua rau cov tshuaj khib nws tus kheej. AMOS ob-barreled 120-mm breech-loading mortar uas hnyav txog 3.5 tons yog npaj rau kev teeb tsa ntawm cov tsheb nruab nrab taug kev thiab cov log tsheb thiab cov nkoj ceev.

Tus txheej txheem AMOS cov neeg ua haujlwm suav nrog tus thawj coj, phom, tus nqa khoom thiab tus tsav tsheb. Ntau lub tshuab tswj hluav taws tuaj yeem teeb tsa kom tau raws li cov neeg siv khoom xav tau. Qib siab ntawm kev siv tshuab ua haujlwm tau tso cai rau AMOS nyuaj ua thawj zaug txhaj 30 vib nas this tom qab nres thiab thim tawm ntawm txoj haujlwm 10 vib nas this tom qab txhaj tshuaj. AMOS tuaj yeem tua thawj plaub qhov kev sib tw hauv tsib vib nas this, tua hluav taws yim teev nyob rau hauv hom MRSI, thiab tswj hwm qhov hluav taws kub ntawm 12 teev ib feeb twg. Lub turret tig 360 °, thiab cov lus taw qhia ntsug yog los ntawm -3 ° txog + 85 °, tso cai rau siv cov tshuaj khib rau ncaj qha rau ntawm qhov ze ze.

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Cov tub rog Finnish, tom qab ua qhov kev ntsuas txuas ntxiv ntawm plaub lub AMOS yees tau teeb tsa ntawm AMV 8x8 lub tsheb, xaj kom 18 tus qauv tsim khoom hauv xyoo 2010. Sab hauv AMV hull yog ib pawg 48-shot. Cov tub rog txaus siab yuav ntau lub tshuab AMOS yog tias muaj nyiaj pab. Txhawm rau kom tau txais lwm txoj hauv kev pheej yig dua rau AMOS system, Patria tau tsim ib lub thoob ib leeg-lub ntsej muag sib xyaw ua kom zoo NEMO (NEw MOrtar) nrog lub peev xwm ntawm 120 hli. Tus qauv tsim qauv tso cai rau Patria hloov qhov kev daws teeb meem no rau cov neeg siv khoom xav tau kev ua haujlwm thiab pob nyiaj siv. Tus pej thuam uas hnyav 1.5 tons tuaj yeem ntsia tau rau ntawm ntau qhov kev taug lossis cov log log 6x6, nrog rau cov nkoj sib ntaus sib tua ceev. Ntawm Eurosatory 2006, lub turret tau nthuav tawm ntawm AMV, uas feem ntau tuaj yeem haum txog 60 puag ncig. Kev siv lub tshuab NEMO ib nrab tso cai rau koj kom tau txais qhov hluav taws kub siab tshaj plaws ntawm 10 rds / min thiab tiv tus nqi hluav taws ntawm 7 rds / min. Tom qab nres, lub tshuaj khib tau npaj rau kev txhaj tshuaj thawj zaug hauv tsawg dua 30 vib nas this, thiab tom qab tua qhov txhaj tshuaj zaum kawg, lub tshuab tau npaj txav mus los tsawg dua 10 vib nas this.

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Hnub no muaj peb tus neeg siv khoom rau NEMO system. Thaum Lub Kaum Ob Hlis 2006, Slovenian Ministry of Defense tau dhau los ua thawj tus neeg siv khoom, tau yuav 12 lub tshuab ua ib feem ntawm kev xaj loj rau 135 AMV tsheb, tab sis vim li cas nyiaj txiag tus lej no tau txo qis rau 30 AMV tsheb hauv xyoo 2012 thiab tsis yog ib qho NEMO mortar complex tau xa tuaj. Saudi Arabia xyoo 2009 tau txais daim ntawv cog lus rau 724 LAV II 8x8 tsheb tsim los ntawm General Dynamics Land Systems-Canada, suav nrog 36 lub tsheb nruab nrog NEMO mortar. Emirates Navy tau xaj yim NEMO Navy yees rau kev teeb tsa ntawm rau rau lub nkoj Ghannatha foob pob.

Ntawm IDEX thaum Lub Ob Hlis 2017, Patria tau nthuav tawm nws NEMO Container mortar system, uas tau tsim los koom tes nrog UAE Navy. NEMO Thawv yog NEMO ntauwd ua ke rau hauv 20ft ISO (International Standards Organization) tus qauv ntim uas tuaj yeem thauj tau los ntawm nkoj nrawm, nkoj lossis tsheb thauj khoom. Cov txheej txheem riam phom no tuaj yeem tua los ntawm ib tus neeg nqa khoom no, ntxiv rau muab tso rau ntawm lub hauv paus ua haujlwm thiab lwm yam khoom nyob ruaj khov.

NEMO Container complex tau txais kev pabcuam los ntawm cov neeg coob ntawm peb: ob tus neeg nqa khoom thiab tus neeg ua haujlwm tua phom, uas tseem ua lub luag haujlwm ntawm tus thawj coj. Hauv txoj haujlwm thauj, tus pej thuam raug kaw tag nrog lub npog thauj. Lub thawv ntim khoom muaj chav rau lub zog siv hluav taws xob, chav tso cua txias thiab 100 lub cuaj mines, uas yog ob npaug ntawm cov nyiaj ib txwm nqa hauv tsheb. Cov neeg siv khoom tuaj yeem txheeb xyuas qib ntawm kev tiv thaiv ballistic, nws tuaj yeem yog cov ntawv hlau lossis cov yas. Txhawm rau nqus cov rog rov qab, lub ntim tau nruab nrog lub zog tubular tsim ntawm cov tawv nqaij sab hauv thiab sab nraud.

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Polish Cancer

Ntawm MSPO 2008, Huta Stalowa Wola (HSW) tau nthuav tawm Rak 120mm ntauwd mortar, uas tau tsim los kom haum rau txhua qhov tsim nyog taug qab lossis lub log tsheb. Lub kaw lus, teeb tsa ntawm Polish pab tub rog Rosomak chassis (ntawv tso cai AMV version ntawm Finnish tuam txhab Patria), tau txais lub npe M120K. Nyob rau hauv ib qho breech-loading cug, txhaj tshuaj yog pub los ntawm cov ntawv xov xwm tig rau 20 feeb. Kev taw qhia yog ua los ntawm kev siv Topaz LMS tsim los ntawm Polish WB Electronics, uas tso cai rau Rak platform, tom qab siv tas, tua thawj zaug hauv 30 vib nas this.

Lwm qhov 26 txhaj tshuaj raug thauj hauv khw hauv lub cev tsheb. Tagnrho -welded turret, ua los ntawm cov hlau ua hlau, tuaj yeem tig 360 °, thiab ntau yam ntawm cov lus qhia ntsug los ntawm -3 ° txog 80 ° tso cai rau hluav taws ncaj qha. Xyoo 2012, HSW pom Rak mortar tau teeb tsa ntawm nws tus kheej taug qab chassis; qhov chaw txawb txawb no tau txais lub npe M120G. Ntawm MSPO 2013 kev nthuav qhia, nws tau nthuav tawm Rak ntawm lub chassis ntawm Marder 1A3 lub tsho tiv thaiv lub tsheb, uas muab lub sijhawm rau German chaw tsim khoom los muab cov tshuaj khib rau cov neeg ua haujlwm ntawm Marder tshuab.

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Thaum lub Plaub Hlis 2016, HSW tau txais thawj daim ntawv cog lus $ 260 lab rau kev muab 64 Rak mortars thiab 32 AWD cov lus txib tsheb, tseem ua raws li Rosomak platform, txaus kom muaj yim lub npe hu ua tuam txhab hluav taws xob qauv (CFM). Rak CFM tus qauv raug xa mus rau txhua tus tub ceev xwm siv tshuab suav nrog yim M120K, plaub AWD, ob lub tsheb AWR rab phom loj, peb AWA cov mos txwv muab tsheb thiab AWRU lub rooj cob qhia txawb. Cov tub rog tau txais nws thawj Rak CFM tus qauv thaum Lub Rau Hli 2017, thiab xa qhov thib yim CFM module coj qhov chaw thaum Lub Kaum Hli 2019, thaum Tebchaws Poland tso daim ntawv cog lus rau 18 qhov ntxiv M120K mortars thiab yim AWD hais kom ua tsheb, txaus kom muaj ob lub ntxiv CFM modules rau ob tus neeg ua haujlwm kho tshuab ….

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Los ntawm lub dawm

Ua ke nrog cov txheej txheem ntauwd, tshiab 120-mm mortars nrog lub qhov qhib qhib kuj tseem tab tom siv. RUAG MRO Switzerland tau qhia Cobra mortar ntawm IDEX 2015, kev txhim kho uas tau pib xyoo 2012, thiab xyoo 2016 tau xa cov qauv mus rau Swiss pab tub rog rau kev sim. Lub tuam txhab kwv yees tias lub tebchaws cov tub rog xav tau 32 120-mm Cobra smoothbore mortar complexes. Cug rau ntawm lub tshuab tig uas hnyav 1350 kg tuaj yeem teeb tsa rau ntawm qhov tsim nyog taug qab lossis lub log uas muaj cov neeg nqa khoom nqa. General Dynamics European Land Systems (GDELS) yuav teeb tsa Cobra cug rau ntawm Piranha 3+ (8x8) platform, xaiv Piranha 4 hauv pab tub rog Swiss, uas yuav nruab nrog lub ru tsev uas thim rov qab hla lub aft compartment. Hauv qhov kev teeb tsa no, Cobra system yuav tau txais kev pabcuam los ntawm cov neeg ua haujlwm ntawm plaub tus neeg tsav tsheb, tus thawj coj thiab ob tus neeg nqa khoom. Lub Cobra nyuaj tau nruab nrog lub khoos phis tawj tswj hwm nrog lub tshuab ua haujlwm tsis siv neeg, nrog rau hluav taws xob tsav rau kab rov tav thiab ntsug qhia nrog phau ntawv thaub qab tsav. Cobra mortar tau nruab nrog lub cuab yeej uas pab txhawb kev thauj khoom, txhawm rau txhawm rau txo qhov qaug zog ntawm kev suav thiab tau txais tus nqi hluav taws kub ntawm 10 ncig hauv 62 vib nas this. Lub kaw lus tuaj yeem pib tua thiab ua tiav lub hom phiaj tua hluav taws hauv 60 vib nas this.

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Cov koom haum Fab Kis, uas suav nrog Arquus, Nexter Systems thiab Thales, npaj yuav muab txog 1,722 Griffon VBMR (Vehicule Blinde Multi Role) 6x6 lub tsheb tsawg kawg 10 qhov sib txawv txhawm rau hloov VAB (Vehicule de TAvant Blinde) 4x4 cov tub rog nqa khoom ntawm pab tub rog Fab Kis. Thaum Lub Kaum Ob Hlis 30, 2019, Thales tau txais daim ntawv cog lus rau kev xa khoom ntawm 54 MERAS (Mortier Embarque Pour I'Appui au Contact) cov xov tooj ntawm tes ua tub rog nrog Thales2R2M 120-mm phom cug rau ntawm lub turntable. Lub 2R2M cov txheej txheem tsim los ntawm nws tus kheej tau pib los ntawm Ltalis rau kev teeb tsa ntawm nws lub tshuab Freccia 8x8, Malaysia (taug qab ACV-19 thiab siv lub log 8x8 AV8), Oman (hloov kho 6x6 VAB) thiab Saudi Arabia (hloov tshiab M113). MERAS mortar kev teeb tsa yuav nruab nrog ATLAS (Automatisation des tirs et liaisons de 1'artillerie sol / sol) kev tswj hluav taws tsim los ntawm Sagem thiab ib lub tshuab ua haujlwm ib nrab uas tso cai rau tus nqi hluav taws kub txog li 10 rds / min. Thawj lub tshuab MERAS tau npaj yuav xa los ntawm qhov kawg ntawm 2023, thiab xa cov khoom seem yog npaj rau xyoo 2024-2027.

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Lub tuam txhab Turkish Aselsan nthuav tawm nws 120-mm mortar system Alkar, thaum xub thawj tau xaiv AHS-120, ntawm IDEF 2017 thiab tsawg dua ob xyoos tom qab pib tsim nws rau tub ceev xwm, txhim kho nws ntawm Vuran 4x4 mine-tiv thaiv lub tsheb ntawm Navy. Lub Alkar turntable muzzle-loading armament system tuaj yeem teeb tsa ntawm txhua qhov tsim nyog taug qab thiab log lub cuab yeej tiv thaiv lub tsheb lossis hauv av kom tiv thaiv kev ua haujlwm tom ntej, hauv qhov no nws tsuas tuaj yeem tso siab rau nws tus kheej lub roj teeb. Thawj cov phom muaj rab phom phom los ntawm MKEK lub tuam txhab, zoo ib yam siv hauv HY-12 rub phom, uas tau ua haujlwm nrog Turkish cov tub rog hauv av, txawm hais tias tuaj yeem txhim kho lub thoob ntim tau raws li qhov xav tau ntawm cov neeg siv khoom. Alkar mortar tau nruab nrog lub tshuab thauj khoom tsis siv neeg, uas tsuas yog xav tau lub tshuab thauj khoom los tso cov mines ntawm cov khoom thauj khoom, thiab khoos phis tawj Aselsan LMS, uas suav nrog kev siv lub tshuab ua haujlwm tsis siv neeg thiab lub radar rau ntsuas qhov pib nrawm. Cov tshuaj khib no tseem tuaj yeem koom ua ke rau hauv kev siv hluav taws tua hluav taws AFSAS (Aselsan Hluav Taws Xob Txhawb Kev Siv Hluav Taws Xob).

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Qhov kawg ntawm lub xyoo no, pab tub rog Danish yuav tau txais CARDOM 10 (Khoos Phib Tawj Ua Haujlwm Rov Los Rov Los Dua Qub Cug Cuam Tshuam) mortar complex los ntawm Elbit Systems Soltam, teeb tsa ntawm Piranha 5. CARDOM system sib xyaw ua ke 120-mm K6 mos txwv zeb thiab rollback mechanism ntawm turntable nrog lub khoos phis tawj tswj hwm. … Thaum Lub Peb Hlis 2017, Tebchaws Denmark tau tshaj tawm daim ntawv cog lus rau Austrian faib Elbit rau kev muab khoom thiab teeb tsa 15 cug phom rau ntawm Piranha 5 lub tsho tiv thaiv tsheb nrog xaiv rau rau ntau daim. Nrog CARDOM cug nyob hauv nkoj, Piranha 5 tuaj yeem nqa txog li 40 cuaj pob zeb. Daim ntawv cog lus, muaj nqis txog $ 16.66 lab, suav nrog kev muab thiab sib koom ua ke ntawm cov tshuaj khib, cov khoom seem, cov ntaub ntawv thiab cov khoom siv qhia. CARDOM 10 / Piranha 5 txoj haujlwm yuav ua rau muaj peev xwm ntau ntxiv ntawm pab tub rog Danish. Cov tub rog tam sim no tab tom ua haujlwm 120-mm towed mortars 20K6V1 (Danish designation MT M / 10), yuav hauv xyoo 2010 rau kev pab tua hluav taws ntawm cov neeg Danish nyob hauv Afghanistan.

Ntawm Eurosatory 2018, ST Engineering thiab Hirtenberger Defense Systems (HDS) tau kos npe pom zoo los txhawb nqa 120mm cug tshuab hauv Europe. Cov tuam txhab yuav txhawb nqa ST Engineering Super Rapid Advanced Mortar System (SRAMS) cov tshuaj khib ua ke nrog MSA thiab 120mm HDS mos txwv. Thaum Lub Kaum Hli 2019, lub tuam txhab Hungarian HDT Defense Industry Ltd yuav HDS ua ib feem ntawm lub xeev txhawb rau kev tsim kho tshiab ntawm kev tiv thaiv kev lag luam.

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American Army cov phiaj xwm

BAE Systems thiab Patria, nrog rau lwm lub chaw tsim tshuaj khib nyiab, tau saib xyuas ze rau Asmeskas Tub Rog txoj kev tshawb fawb rau tus kheej lub zog tshiab 120mm tus kheej-propelled system. Xyoo 2018, Tsoomfwv Meskas tau tshaj tawm txoj kev tshawb fawb txog kev lag luam txhawm rau txheeb xyuas cov neeg cog lus muaj peev xwm tsim thiab tsim Mortar FIFT (Yav Tom Ntej Cov Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob) cov pej thuam uas tuaj yeem haum rau Stryker 8x8, Armored Multipurpose Vehicle (tam sim no hloov qhov seem uas tau taug qab M113 platforms)) thiab tiam tom ntej Next Generation Combat Vehicle, uas thaum kawg yuav hloov M1 Abrams tank thiab M2 Bradley BMP. Cov tub rog tab tom nrhiav "120mm turret uas muab kev tiv thaiv tiv thaiv cov yeeb ncuab tiv thaiv lub roj teeb thiab tiv thaiv cov tub rog los ntawm lub suab nrov nrov thiab dhau siab." Cov phom cug no yuav tsum muaj peev xwm tua tau ntev piv rau cov tub rog uas siv lub tshuab cug (BMS) los yog Cov Tsov Rog Rov Los Cug System-Teeb (RMS-L). 120 -mm mortar Mortar FIFT yuav tsum muaj peev xwm tua hauv MRSI hom ("Flurry of fire" - hom tua thaum ob peb lub mos txwv raug tua los ntawm ib rab phom ntawm ntau lub kaum ntse ntse mus txog lub hom phiaj tib lub sijhawm), tua ntawm lub hom phiaj nrog hluav taws ncaj qha thiab tso cai rau kev koom ua ke ntawm cov txheej txheem tshiab kawg. Piv txwv li, loitering mos txwv LMAMS lossis SMAMS ".

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Lub koom haum FIFT, uas tuaj yeem muaj neeg nyob lossis tsis muaj neeg nyob, yuav tsum muaj tus yam ntxwv zoo ntawm qib siab ntawm kev siv tshuab, tso cai rau nws ua lub luag haujlwm tua hluav taws tsis pub dhau 60 vib nas this tom qab tau txais kev txiav txim, suav nrog kev txav mus los, thiab muaj qhov tsawg kawg ntawm qhov hluav taws kub ntawm 6 txhaj tshuaj hauv 4 vib nas this hauv MRSI hom thiab ntau kawg ntawm 12 txhaj tshuaj. Lub kaw lus yuav tsum muab qhov siab tshaj plaws ntawm qhov hluav taws kub tsawg kawg 16 puag ncig hauv thawj feeb thiab tom qab ntawd tswj tus nqi ntawm 6 puag ncig / feeb ntev (qhov xav tau yam tsawg kawg nkaus). Nws yog qhov xav tau uas lub kaw lus muab qhov hluav taws kub siab tshaj plaws ntawm 24 rds / min rau ob feeb thiab qhov hluav taws kub txuas ntxiv ntawm 12 rds / min (lub hom phiaj xav tau). Qhov tsawg kawg ntawm kev tua phom tau teeb tsa yam tsawg 8000 meters, thiab lub hom phiaj yog 20,000 meters.

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