槽型光电感测器:PU-R977-P PU-F976-P PU-Y974-P PU-T972-P PU-LP70-P PU-K970-P PU-670N PU-670P PU-670M PU-670F PU-671N PU-671P PU-671M PU-671F PU-672N PU-672P PU-672M PU-672F PU-674N PU-674P PU-674M PU-674F PU-676N PU-676P PU-676M PU-676F PU-677N PU-677P PU-677M PU-677F