It is pointed out that the cause of decrease in cracking load is mainly due to the presence of ducts in concrete elements which weaken the burstingresistance of the anchorage zone.
指出预留孔道削弱了锚固区抗劈裂的能力，成为降低开裂荷载的主要因素。
2
After finishing with wool protein solution, the crease recovery, abrasion resistance, bursting strength and capillary effect of the cotton knitted fabric has been improved.