Gravity ball check may be converted for air or gas venting by replacement of standard ball with floater PP ball.
通过用漂浮的PP球更换标准球，重力球形止回阀可以改造为适用于空气或气体排气口。
The company mainly produces the products involving PP-R ball valve, anglevalve, stop valve, check valve and pipe fittings.
本公司主要生产PP-R球阀、角阀、截止阀、止回阀、管接头等产品。
The company mainly produces the products involving PP-R ball valve, angle valve, stop valve, check valve and pipe fittings.
本公司主要生产PP-R球阀、角阀、截止阀、止回阀、管接头等产品。
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