伞齿轮低温闸阀 DZ40Y-40LCB，DZ40Y-40LC1，DZ40Y-40LC2，
凹面法法
MFM
DZ40Y-64LCB
DZ40Y-64LC1
DZ40Y-64LC2
DZ40Y-64LC3
DZ40Y-64LC4
DZ40Y-64P
DZ40Y-64R


25


210


135


100


78


58

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