The piston ring grooves for a standard engine are （）<br>A:chromium-plate against wear<br>B:anti-corrosion treated<br>C:white metal lined against wear<br>D:flame hardened against wear

The piston ring grooves for a standard engine are （）
A:chromium-plate against wear
B:anti-corrosion treated
C:white metal lined against wear
D:flame hardened against wear

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)