東光產品 延性鑄鐵
fig801a-1 DUCTILE IRON GATE VALVE
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FIG.827 DUCTILE IRON DUAL PLATE CHECK VALVE
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FIG.803A-1 DUCTILE IRON
Y-STRAINER
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FIG.802A-1 DUCTILE IRON SWING CHECK VALVE
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fig.866-1 DUCTILE IRON SILENT CHECK VALVE
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FIG.804A-2 DUCTILE IRON GLOBE VALVE
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