题目内容
(请给出正确答案)
[主观题]
It is important to note that the injection only takes place when the plunger is moving up
the cam _____.
A.base circle
B.slope
C.bottom point
D.top point
提问人:网友gwzhangxx
发布时间:2022-01-06
A.base circle
B.slope
C.bottom point
D.top point
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