Machined brass construction, durable plastic check modules, injection molded of acetyl resin, silicone discs, Buna 'N' seals, and stainless steel springs.
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Machined brass construction, chrome nickel plated body, EPR rubber check disc assemblies and Buna 'n' seals, stainless steel springs and pressure plates are standard.
标准配置为机加工黄铜结构，镀铬镍阀体，乙丙橡胶止回阀瓣总成和丁钠橡胶密封，不锈钢弹簧和压力板。
The springs are coated by anticorrosive coating or made of stainless steel materials, which ensures good line contact and has positive effect on driving safety.
弹簧采用有防蚀镀层或用不锈钢材料制作，能确保线路接触的良好，对行车的安全性有积极的效果。
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