vt. lock
misc. rifle bolt ; firearm bolt
咔嗒一声,猎人扳动了枪机。
他伸手摸到那支空枪,瞄准了,扳动枪机。
He reached for his empty gun, aimed, and pulled the trigger.
因水阻力较难准确求得,可利用实验确定活动件(枪机)运动总阻力。
The total kinetic resistance of a moving part (a firearm bolt) was acquired by experiment because water resistance was difficult to be got accurately.
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