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Perfectionnements apportés aux télescopes et caméras
申请公布号:
FR999634(A)
申请号:
FRD999634
申请日期:
1949.11.16
申请公布日期:
1952.02.04
申请人:
N. V. OPTISCHE INDUSTRIE
分类号:
G02B17/04;G02B17/08
主分类号:
G02B17/04
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