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阀门
球形阀
蝶形阀门
调节阀门
调节阀门 DN40 PN40
PNEUMATIC ADJUSTMENT VALVE DN 500 PN 16 WAFER TYPE - CARBON STEEL BODY WITH PTFE COVERING SEAL IN NITRILE RUBBER WITH RILSAN COATED LENS AUXILIARY CONTROL MANUAL HANDWHEEL
止逆阀 2.A4IIIIE. DN300, ANSI150