Screw pump is a kind of rotary pump, when the outlet end is blocked, the pressure will gradually increase, so that more than a predetermined pressure value.

螺杆泵是一种容积式回转泵，当出口端受阻以后，压力会逐渐升高，以至于超过预定的压力值。

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The squeezing stress between the valve end the screw for adjusting valve clearance must be taken into account in designing high speed valve train.

高速配气机构设计中一个不可忽视的薄弱环节是气门间隙调整螺钉头部的挤压疲劳。

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Let's screw the two pipes together end to end.

咱们把这两根管子接起来拧紧。

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Numbers of livestock have fallen by 40%, partly thanks to an epidemic of screw worms that had spread to two-thirds of Iraq's provinces by the end of last year.

ECONOMIST: Iraq