A.1和0.1 B.1和0.2 C.1.2和0.2 D.1和0.25
A.增大 B.減小 C.無(wú)影響
A.A B.B C.C D.D
A.梯形螺紋 B.細(xì)牙三角螺紋 C.粗牙三角螺紋 D.矩形螺紋