["Welche Arten von pneumatischen Abcutfellen gibt es", "Was gibt es außer der O-Valven?", "Schlupteilech,Valven,Schl C",]
Thread Content
除了o型阀还有什么？
衬塑球阀，截止阀，闸阀，蝶阀，等等。我也是新手。
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