Example: air traffic controller
Op ixer n
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OP IXER OP MIXER - hanwa-jp.com
www.hanwa-jp.comop ixer n-Øz jisiok od 50hz (min-i) 60hz 1/13 1/15 1/21 115 ioo 71 138 120 86 1/25 1/51 1/71 60 29 21 72 35 25 1/87 20 300 220 620 295 590 550