单项选择题
A.合股 B.直接纱 C.复络纱 D.去皮纱
A.≤9 B.≤7 C.≤5
A.60mm B.50mm C.100mm
A.120±5 B.110±5 C.105±5 D.125±5
微信扫一扫,加关注免费搜题
