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in recent years, the domestic pump valve industry has been developing very rapidly, but there are still many problems

from the point of view of the operator, the frequency conversion motor is a poor quality motor, and the ordinary motor is the good motor.3, in order to meet the inverter output pwm adjustable wide ...

customers in the green ring pumps inquiry, green ring salesman will ask the client's condition, so what is a "condition", "condition" is really very important? don't you know the model is not enough