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xoog adkaysi sare pc silig prestressed birta birta silig guga birta
Birta Kaarboon, oo sidoo kale loo tixraaci karo birta-carbon-ka-baxsan, waa daawaha birta ah ee la sameeyay iyadoo la isku daray xaddi kala duwan oo kaarboon iyo bir ah.Walxaha kale ayaa laga yaabaa inay sidoo kale jiraan laakiin tiro aad u yar si ay u saameeyaan sifooyinka jir ahaaneed.Silig birta kaarboon ah oo leh kaarboon yar ayaa leh sifooyin la mid ah birta oo jilicsan oo si fudud loo sameeyo.
