The volume of the powderchamber 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。
2
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。
3
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.