单项选择题
A.1000mm B.1100mm C.1200mm D.1500mm
A.500mm B.550mm C.600mm D.650mm
A.上表面 B.下表面 C.左侧 D.右侧
A.0.10 B.0.15 C.0.20 D.0.30
微信扫一扫,加关注免费搜题