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发明名称
Intermediate ring for a manhole cover
摘要
The intermediate ring 8 which serves for the vertical adjustment of a seat part 2 having a lid 3 in a guiding part 4, has a bevelled circumferential surface 11. <IMAGE>
申请公布号
DE3522676(A1)
申请公布日期
1987.01.08
申请号
DE19853522676
申请日期
1985.06.25
申请人
WIEDENMANN,WILHELM
发明人
WIEDENMANN,WILHELM
分类号
E02D29/14;E03F5/02;(IPC1-7):E03F5/02
主分类号
E02D29/14
代理机构
代理人
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