常見例句The chief features of this kind of pump are the wider range of working pressure, the higher pumping speed at the higher pressure and the higher maximum forepressure. 這種泵的主要特點是：工作壓強範(fàn)圍寬、在較高壓強下有較大抽速、最大出口壓強較高。limiting forepressure 極限前級壓力, 極限前級壓強forepressure breakdown 前級壓強破壞forepressure characteristic 前級壓強特性forepressure gauge 前級真空槼 返回 forepressure