/ > - , , , , O-ring - - Ningbo Zhonggao , - - - , , , ,
May 15, 2017
- , , , ,
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O- , , 2.65 3.55 30 , , 3.55 O-ring
O- butyl nitrile FKM,
, - , , 60 90 , , , - ( ) , -
, - , 70 ,
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