二是由于热熔连接是对塑料管的二次加工，使得优质塑料变成回用塑料，连接的可靠性降低。
Two is due to the hot melt connection is the plastic pipe of the two processing, make high quality plastic into recycled plastic, connection reliability.
二是由于热熔连接是对塑料管的二次加工，使得优质塑料变成回用塑料，连接的可靠性降低。
Two is due to the hot melt connection is the plastic pipe of the two processing, make high quality plastic into recycled plastic, connection reliability.
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