Alaabta
Kubbada xajinta xaglaha ah ee xagal safka ah ayaa qaadi karta culaysyada dhidibyada ee hal jiho oo keliya.Gawaarida leh xagal xiriiri oo ah 30° (A) ama 40° (B) waxay caadi ahaan isticmaalaan birta la riixay, resinka la shubay, ama qafis naxaas ah oo mishiinaysan, in kasta oo resin synthetic mashiineed ama qafisyada xajinta polyamide ee khaaska ah loo isticmaalo codsiyada qaarkood.