正确答案: A
镀铬或镀铁
题目:排气阀阀杆磨损超过标准要求时,可采用()工艺修复阀杆。也可以采用喷涂或喷焊工艺修复。
查看原题 查看所有试题
学习资料的答案和解析:
[单选题]为了检验螺旋桨的螺距,关键是应测量计算出()螺距。
局部
[单选题]Diesel engines are started by supplying () into the cylinders in the appropriate sequence for the required direction.
compressed air
[单选题]The position of the piston parts in relation to each other is secured by means of () in the crown.
a dowel pin