flappy
moots专利名称：PURGE UNIT北京会计培训
发明人：EMAASON JIEI HOORENBETSUKU 申请号：JP5933880
在线学习德语
申请日：19800502
公开号：JPS55153680A
面试常见问题公开日：
social responsibility
英语培训中心简介
19801129
glass
专利内容由知识产权出版社提供
照片的英文单词
摘要：An improved purge unit is provided for establishing an enclod zone around a weld area for retaining an inert gas. The purge unit is particularly advantageous when welding a branch pipe or pipe connection to a main pipe or header. The purge unit has a cone-shaped member which is inrted into an opening in the header through the branch pipe or connection and is then expanded to establish the enclod zone around the inside of the weld area. An inert gas is then supplied through the purge unit into the zone and the cone-shaped member is subquently collapd and withdrawn after the weld is complete. An expandable tube is employed to expand the cone-shaped member and has a rod extending therethrough and connected to the member to provide greater stability for the purge unit.
申请人：HALLENBECK EMERSON沸水反应堆
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