Applicable to pumping can not be in addition to air and other condensable and non-corrosive gases, widely used in pumping speed and the need for large variety of high vacuum in the system really.

• 适用于抽除空气及其它无可凝性及无腐蚀性的气体，广泛应用于需要大抽速和高真空的各种真这系统中。