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First, the valve leakage: Reason: 1. Strict closure 2. Combination of surface damage 3. Spool and stem clearance is too large, resulting in spool drooping or contact is not good 4.
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.