Change the filter cartridge as often as instructed by the manufacturer.按照生产厂家的使用说明，经常更换过滤筒。This rifle only holds one cartridge.这支来复枪只能装一发子弹.He was attacked by a security man who tried to wrest away a gas cartridge.他遭到一名保...
Change the filter cartridge as often as instructed by the manufacturer.按照生产厂家的使用说明，经常更换过滤筒。The cartridge must be replaced at regular intervals.弹药必须定时更换。This rifle only holds one cartridge.这支来复枪只能装一发子弹....