问题描述：
[单选]
The crank-room cover should not be opened until at least（）minutes after the engine stops．
A．one
B．fifteen
C．sixty
D．ninety
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：The crankshaft is of the semi built type， with the journal（）the forged or cast steel crank throws．
下一篇：The crankcase cover should never be allowed to open for investigation when（）
- 我要回答: 网友(3.14.134.18)
- 热门题目: 1.利用拐挡表测量主机曲轴臂距差 2.关于曲轴臂距差的测量值如果测 3.目前国内外均以（S＋D）/2