| 1. | The second check valve has a lighter weight spring
第二止回阀则配置较轻的弹簧。
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| 2. | Marine forged steel male thread stop and check valves
船用外螺纹锻钢截止止回阀
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| 3. | Marine flanged cast steel over board stop check valve
船用法兰铸钢舷侧截止止回阀
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| 4. | J kind of flanged cast iron 0 . 5mpa stop check valves
J类法兰铸铁0 . 5mpa截止止回阀
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| 5. | J kind of flanged cast iron 1 . 0mpa stop check valves
J类法兰铸铁1 . 0mpa截止止回阀
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| 6. | J kind of flanged cast steel 1 . 0mpa stop check valves
J类法兰铸钢1 . 0mpa截止止回阀
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| 7. | J kind of flanged cast steel 2 . 0mpa stop check valves
J类法兰铸钢2 . 0mpa截止止回阀
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| 8. | J kind of flanged bronze 1 . 6mpa stop check valves
J类法兰青铜1 . 6mpa截止止回阀
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| 9. | Check valve guiding shall be plastic to plastic
止回阀引导装置应该是塑料对塑料。
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| 10. | J kind of flanged bronze 0 . 5mpa stop check valves
J类法兰青铜0 . 5mpa截止止回阀
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