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发明名称
PRODUCTION OF ND FILTER
摘要
申请公布号
JPS556364(A)
申请公布日期
1980.01.17
申请号
JP19780078941
申请日期
1978.06.29
申请人
RICOH KK
发明人
MIYASHITA TAKAAKI
分类号
C23C14/14;G02B5/22
主分类号
C23C14/14
代理机构
代理人
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地址
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