1,small size,light weight,compact design ,dependable for use .
2, two holes of ac contactor, two air plugs are connected to the electric control, the power cord and control wire are not interfered with each other, and they are not entangled with each other,more convenient for customers use.
3,improved electric control part,ac contactor is used to control up and down operation,the most stable performance compare with the same kind of products .

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