1.單向閥.有效流通面積大2.操作簡單，滑動靈敏3.連接牙紋可靈活搭配選擇?4.開閉時可將開關與執行組件之間的管路內氣體排出，方便管路中組件的替換或維修。?1. One-way valve, make effective circulation area large 2. Simple operation, sliding sensitive?3. It can be flexible to choice the thread of the port to connect?4. When opening and closing the gas of the pipe between the switch and implementation components can discharge,so that it will be convenience to replacement of the pipe components or maintenance?
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