膨胀机为进气有阀、排气无阀的短活塞型。
The expansion engine which has a inlet valve without exhaust valve, is a short piston engine.
推导了此类无阀压电泵的流量计算公式及效率公式。
Some formulae for volume flow and efficiency of the pump are derived.
介绍了新开发的催化剂无阀输送控制系统的特点。
Characteristics of the newly developed control system for non valve catalyst transfer were introduced.
应用推荐