单项选择题
A.抓梁体B.泵站系统C.接线盒D.导向滚轮装置
A.12hB.24hC.36hD.60h
A.0.5mB.0.75mC.1mD.1.25m
A.3.5mB.0.5mC.1.5mD.1m
微信扫一扫,加关注免费搜题