升降式止回阀
Lift check valve
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旋启式止回阀
Swing check valve
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对夹式升降式止回阀
Wafer lift check valve
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对夹蝶式止回阀
Butterfly butterfly check valve
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立式止回阀
Vertical check valve
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锻钢止回阀
Forged steel check valve
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内螺纹止回阀
Internal thread check valve
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衬氟止回阀
Fluorine-lined check valve
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