A.WS30010 B.WSR3010 C.WS3010 D.WSR30010
A.2 B.3 C.4 D.5
A.抗滑移系數(shù) B.扭矩系數(shù) C.化學成分 D.力學性能
A.1 B.1.2 C.1.5 D.2
A.10 B.7 C.5 D.3