Starting air valves are held firmly on their seats by（）<br>A:cam rollers on the camshaft<br>B:spring force<br>C:air pressure on top of the valve differential piston<br>D:air pressure on the bottom of the valve differential piston

Starting air valves are held firmly on their seats by（）
A:cam rollers on the camshaft
B:spring force
C:air pressure on top of the valve differential piston
D:air pressure on the bottom of the valve differential piston

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:【10245629】个 (题库试题定时更新)