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发明名称
Spectral method for monitoring atmospheric contamination of inert-gas welding shields
摘要
申请公布号
US3271558(A)
申请公布日期
1966.09.06
申请号
US19650434143
申请日期
1965.02.19
申请人
DAVIS BILLY K
发明人
DAVIS BILLY K.
分类号
B23K9/095
主分类号
B23K9/095
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