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发明名称
ROCK BOLT AND EXECUTION THEREOF
摘要
申请公布号
JPH02161099(A)
申请公布日期
1990.06.20
申请号
JP19880315896
申请日期
1988.12.14
申请人
SUMITOMO METAL IND LTD
发明人
ABE YUKIO;KOYAMA SEIICHI;IIDA TAKESHI
分类号
E21D20/00
主分类号
E21D20/00
代理机构
代理人
主权项
地址
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