Petrochemical Industry is put oil or gas into material (as plastic, and rubber, and fiber, and chemicals,), again will these material processing became daily supplies (as shoes, and tire, and, and paint,) diaphragm pump main for various media of conveying and cycle, in petrochemical industry also is expanded application, in petrochemical industry in the diaphragm pump main conveying crude oil, heavy oil, oil, mud, sludge.
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