return-drain pump

If not, the effect air pump return instructions.

如果操纵, 表明气泵回油成果欠好.

The heat-supply system with distributed variable frequency pump is a heat-supply system in which the flow rate is regulated with return-water pressured pump, instead of valve, set at return water pipe on the high-temperature side of heat exchange in substation.

分布式变频泵供热系统是指在热力站换热器一次侧回水管上设置回水加压泵，代替阀门完成流量调节的供热系统。

"D" type bearings with the lubrication mechanism of polymer, make the bearing surface, and return to the pump inlet side, in order to ensure the effective axis.

“D”型轴承结合了强制润滑机理，使聚合物经轴承表面，并返回到泵的进口侧，以确保旋转轴的有效润滑。

The construction and working principles of speed sensor, ABS ECU, electromagnetic valve and return liquid pump are analysized in detail.

深入探讨了轮速传感器、防抱死制动电子控制器、电磁阀、回液泵的结构组成与工作原理。

When the airbed fully inflated, return the pump to the housing of airbed to stop the inflation.

当气床充完气后，把泵返回气床内，停止充气。

Health stainless steel centrifugal pump, cam rotor pump, a return pump, Self-suction pumps.

不锈钢卫生离心泵 、 凸轮转子泵 、 回程泵 、 自吸泵.