活瓣式氧氣瓶閥

Product name: flapper type oxygen cylinder valves
Model: F - 1
Specifications: 1 F
Product introduction: applicable to oxygen, nitrogen, air, nominal pressure, nominal size 15 MPa: DN4mm export thread: internal thread W23 * 1/14 and cylinder connecting thread: GB8335 PZ27.8 safety device temperature or pressure: 21 + / - 1.5 MPa
老色鬼好大好爽av
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