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单选题
防止拉缸的工艺措施主要是()。Ⅰ.保证活塞运动装置的安装精度;Ⅱ.保证活塞运动装置的对中性;Ⅲ.采用波纹加工;Ⅳ.采用精车加工;Ⅴ.采用研磨加工。
A
Ⅰ+Ⅱ
B
Ⅰ+Ⅳ+Ⅴ
C
Ⅱ+Ⅲ
D
Ⅰ+Ⅱ+Ⅲ
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