单项选择题
A.206G B.206G(P C.209T(P) D.209PK
A.(25±3)mm B.(30±3)mm C.(35±3)mm D.(40±3)mm
A.(30±2)mm B.(40±2)mm C.(50±2)mm D.(55±2)mm
A.不大于20mm B.不大于25mm C.不大于30mm D.不大于35mm
微信扫一扫,加关注免费搜题