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 QB/T 2072.4-1994  
(Sugar machinery pressure vessel GM parts. Steel hanging bracKet)

制糖机械.压力容器通用零部件.钢制悬挂式支座
 GB/T 6556-1994  
Type,main dimension,material and marKing of mechanical seals

机械密封的型式、主要尺寸、材料和识别标志

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