The volume of the powder chamber is a crucial parameter affecting the interior and exterior ballistic performance.

药室容积是影响内外弹道性能的重要参数之一。

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The timer then opens the lower valve for a fixed period of time, permitting the - plastic powder to discharge from the intermediate chamber.

定时装置随后开启下面的夹管阀并持续一段固定的时间，让塑料粉末从中间罐腔中排出。

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There was no damage found inside, but there was a little of metal powder in the arc chamber and porcelain bushing and some of the powder has been burned.

阐述了返厂解体检查的情况，内部未发现损伤，但灭弧室和瓷套内有微量金属粉末，部分有灼痕。

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Eventually, though, the drill will go deep enough to push rock powder into the drill's sample-gathering chamber.

BBC: Curiosity Mars rover spins its rock drill

Pro-hunt protesters stormed the Commons chamber in the same year, while campaigners from Fathers 4 Justice threw purple powder at Tony Blair during prime minister's question time.

BBC: Parliament rooftop protest ends