发明授权
US4167332A Indication and photometric unit 失效
指示和光度单位

Indication and photometric unit
摘要:
The present invention relates to an integrated circuit body suited to be applied for a TTL single reflex camera, by arranging at least two of the three circuit parts, namely the indication circuit part presenting an indication function, the light sensing circuit part presenting a light sensing function and the control-operation circuit part.
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