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casting flange
AWWA C207
CARBON FLANGE
S.S.FLANGES

casting flange 

碳钢材料-1

GB20n;20#;Q235ABCD;Q345ABCD;ASTMA105;A350LF2

碳钢材料-2

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不锈钢及双向钢-1


ASTM304/304L;316/316L;


不锈钢及双向钢-2

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