发明名称 |
|
摘要 |
|
申请公布号 |
JPS474883(Y1) |
申请公布日期 |
1972.02.21 |
申请号 |
JP19690008657U |
申请日期 |
1969.02.03 |
申请人 |
|
发明人 |
|
分类号 |
(IPC1-7):E21C13/04 |
主分类号 |
(IPC1-7):E21C13/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
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