是一种节能、环保型的塑料管材。
It is a kind of plastics pipe of energy saving and environmental protection.
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超声波信号穿过所有常见的金属和塑料管材。
The ultrasonic signal travels through all common metal and plastic pipe materials.
芯层发泡复合PVC管材是一种新型塑料管材。
The sandwich foamed pipe is a new kind of piping material.
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