Tests for friction angles between wool, cashmere, Angora raaait hair, yak hair and pins of flexible clothing and teeth of MCC wire were made respectively.

• 分别对羊毛、山羊绒、安哥拉兔毛、牦牛毛与弹性针布钢针、金属针布针齿的摩擦角进行了测试.