... , car, hoist, various type car our factory's hour counter belongs to electromagnetism type structure, its structure is ... it then starts record a work for time, this timer is divided into the 110 V60 Hzs and 220 ... rotated a word) for an hour, be the alternate current as 50 Hzs, an hour, the round also records ... machine as±1%.The total amount record of this timer can reach to for 99999.99 hours.The ...