问题描述：
[单选]
Opening of the cylinder（）will admit compressed air into the cylinder．
A．safety valve
B．indicator cock
C．blow-down valve
D．start valve
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：Operating conditions in the crank chamber are very（）those in the cylinder．
下一篇：Once all cylinders are firing regularly，（）is shut off．
- 我要回答: 网友(216.73.216.220)
- 热门题目: 1.并联连接系统按照部件的连接情 2.并联部件的数量越多，每一并联 3.并联连接系统的不可靠度（）系