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产品代码 (HS 2017)
847989
Machines and mechanical appliances; having individual functions, n.e.c. or included in this chapter
PSN-ME系列带机械锚的压紧垫衬器
DESCRIPTION
用于将井的生产管柱的两个间隔与一个或多个层分开。被应用在注入井和生产井中