push pull

基本解释

Push pull train?
推拉式列车?。
Push pull Ventilation is a kind of ventilation device that can control polluting resouce diffusion effectively.
吹吸式通风装置是一种能有效控制污染源扩散的通风装置。
A study has been done over the small crack growth rate for kinds of carbon steels under push pull and rotating bending.
对多种碳素钢在拉伸压缩和旋转弯曲负载下的微小裂纹扩展速率进行了研究。

In daily life, everything seems to come to rest unless you push it or you pull it or you exert some kind of force.
在日常生活中,一切物体都会停下来,除非你去推它,或者拉它,或者施加某种外力
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Wold believes that in this push and pull — the theater owners have the advantage.
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He said there are several factors that could result in a push-pull on values.
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The tweaker inherits things as they are, and has to push and pull them toward some more nearly perfect solution.
NEWYORKER: The Tweaker