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发明名称
Improvements relating to the manufacture of concrete pipes
摘要
申请公布号
GB634198(A)
申请公布日期
1950.03.15
申请号
GB19470009149
申请日期
1947.04.03
申请人
JOHN ELLIS & SONS LIMITED;FRED RICKABY;DENNIS ALAN DOWDESWELL;JOHN WILFRED ELLIS HAYES
发明人
分类号
B28B21/94
主分类号
B28B21/94
代理机构
代理人
主权项
地址
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