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经营范围
发明名称
HIGH VISCOUS MUD LIQUID MAINLY COMPRISING BENTONITE
摘要
申请公布号
JPS63304893(A)
申请公布日期
1988.12.13
申请号
JP19870136039
申请日期
1987.05.31
申请人
SHIMODA GIJUTSU KENKYUSHO:KK
发明人
SHIMODA KAZUO
分类号
E21B21/00
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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