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发明名称
Apparatus for measuring the specific gravity of a gas
摘要
申请公布号
US2642738(A)
申请公布日期
1953.06.23
申请号
US19470721639
申请日期
1947.01.11
申请人
POWELL JR JONATHAN S
发明人
JR. JONATHAN S. POWELL,
分类号
G01N9/32
主分类号
G01N9/32
代理机构
代理人
主权项
地址
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