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发明名称
GAS COLLECTING DEVICE
摘要
申请公布号
JPH03295997(A)
申请公布日期
1991.12.26
申请号
JP19900099043
申请日期
1990.04.14
申请人
SAITO HIROSHI
发明人
SAITO HIROSHI
分类号
E21B43/00
主分类号
E21B43/00
代理机构
代理人
主权项
地址
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