This paper introduced the disadvantages of the old pistol air compressor and effect on saving energy by promoting new type double screw compressor.
介绍了老式的活塞型空压机的缺陷，推广新型双螺杆空压机的节能经济效果。
This paper introduced the disadvantages of the old pistol air compressor and effect on saving energy by promoting new type double screw compressor.
介绍了老式的活塞型空压机的缺陷，推广新型双螺杆空压机的节能经济效果。
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