干燥瓶 66-9352

680-53

680-1 3/4"

680-1

types of mechanical seals...

7K-50

7K-35

3N-55

3N-28

3N-20

mechanical seal GR-SE-32 ...

John crane mechanical sea...

HFJ900-32

阀板

单端面集装式密封件MA290-4...