Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.<br>A:the cylinder cover<br>B:the piston rings<br>C:the piston crown<br>D:the piston skirt

Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.
A:the cylinder cover
B:the piston rings
C:the piston crown
D:the piston skirt

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10252701】个 (题库试题定时更新)