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Natural mechanical precise carbon graphite ring
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Antimony carbon graphite impregnated seal ring ...
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Antimony impregnated graphite seal ring resin i...
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Mechanical seal graphite ring impregnated with ...
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Impregnated self-sealing graphite ring impregna...
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Antimony impregnated graphite ring high tempera...
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Vacuum pump graphite seal ring impregnated with...
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Antimony graphite seal ring wear-resistant pump...
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Antimony impregnated mechanical seal graphite r...