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发明名称
RING-SHAPED APPARATUS FOR PREVENTING BLOWING-OUT
摘要
申请公布号
JPS58146693(A)
申请公布日期
1983.09.01
申请号
JP19820234899
申请日期
1982.12.28
申请人
CAMERON IRON WORKS INC
发明人
BORII SHII UIRIAMUZU ZA SAADO;RICHIYAADO EMU CHIYAACHI JIYUNIAA
分类号
E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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