Waxaa loo isticmaalaa tijaabinta xoogga jiidista birta, qaabaynta duritaanka, madaxa jiidista birta ee nayloonka ah ee hoos yimaada qaab-dhismeedka la cayimay.
QB/T2171,QB/T2172,QB/T2173,ASTM D2061-2007
1. Waxaa jira afar goobood oo shaqo oo lagu dooran karo goobo shaqo oo kala duwan iyadoo loo eegayo madaxyada kala duwan ee sibka;
2. Sida waafaqsan heerarka kala duwan, si toos ah ayaa loogu hagaajiyaa xawaaraha kala duwan ee rarista (GB 10mm/daqiiqo, heerka Mareykanka 13mm/daqiiqo);
3. Fur qaabka qaabka sibka gaarka ah si loo fududeeyo tijaabinta sibka aan caadiga ahayn;
4. Shaashadda taabashada midabka leh, xakamaynta, is-dhexgalka Shiinaha iyo Ingiriisiga, qaabka hawlgalka liiska.
5. Habka tirtirka warbixinta wuxuu qaataa tirtirid la xushay si loo fududeeyo tirtirka natiijada baaritaanka;