... the product has a temperature, pressure, wear, "one drainage," "life-long self-absorption" and many other features. At present production of ... take, drop, leak, a substitute for a variety of long axis of liquid pumps, submersible pumps, submersible sewage pumps and other equipment ... "electric air control valve", truly a "one-draining, life-long self-priming." 4, little vibration, low noise, mobile and ...