Birta aan birta lahayn
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Bir khaas ah 20 # hexagon 45 # hexagon 16Mn bir laba jibaaran
Marka loo eego nidaamka kala duwan, waxaa loo qaybin karaa bir qaabaysan oo kulul, jeexan qabow (qabow la sawiray) bir gaar ah, qaloocin qabow, bir qaabaysan oo gaar ah iyo wixii la mid ah.
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304 ahama bir laba jibaaran bar eber cut bir laba jibaaran
304 birta laba jibbaaran ee birta ah waa nooc ka mid ah walxaha birta ah ee caalamiga ah, iska caabin miridhku xoog leh, iska caabin heerkul sarreeya ayaa sidoo kale aad u wanaagsan, wuxuu leeyahay iska caabin daxalka aad u fiican iyo iska caabinta daxalka iyo iska caabinta intergranular wanaagsan, birta waxay leedahay iska caabin daxalka.Inta badan loo isticmaalo alaabta guriga, qaybaha baabuurta, qalabka caafimaadka, dhismaha, warshadaha cuntada, qaybaha markabka iyo wixii la mid ah.
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No. 45 bir wareeg ah oo qabow sawir wareeg ah chrome dahaadhay bar aan sabab lahayn gooyn eber
Birta wareega waxa loo kala saaraa mid kulul, la been abuuray iyo qabow la sawiray.Birta wareegsan ee kulul ee duuban waa 5.5-250 mm cabbirkeeda.Waxaa ka mid ah: 5.5-25 mm bir wareeg ah oo yar oo inta badan si toos ah ugu dhejisa xirmooyinka sahayda, oo caadi ahaan loo isticmaalo xoojinta baararka, boolal iyo qaybo farsamo oo kala duwan;Bir wareeg ah oo ka weyn 25 mm, inta badan loo isticmaalo soo saarista qaybo makaanik ah, tuubo bir ah oo maran, iwm.