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发明名称
Apparatus for determining the characteristics of lake beds and the like
摘要
申请公布号
US2261375(A)
申请公布日期
1941.11.04
申请号
US19380202240
申请日期
1938.04.15
申请人
JACOBS HENRY R
发明人
JACOBS HENRY R.
分类号
G01N33/24;G01V1/00
主分类号
G01N33/24
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代理人
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