发明名称 Quick opening internal manway for towers
摘要 A manway cover is formed using two like door panels made of lightweight, corrosion-resistant material which are hand operable from either side of the manway and can be installed without tools.
申请公布号 US4294049(A) 申请公布日期 1981.10.13
申请号 US19800117159 申请日期 1980.01.31
申请人 MARATHON OIL COMPANY 发明人 YOUNG, DICK K.;SUMNER, KENNETH E.
分类号 E02D29/14;(IPC1-7):E02D29/14 主分类号 E02D29/14
代理机构 代理人
主权项
地址