钟表指针机构SMH分别为秒分时针,已知各轮的齿数Z2=60、Z3=8、Z4=64、Z5=21、Z6=84、Z8=90试求Z1和Z7
Z1呢?
Z1=1÷(60÷Z2×Z3÷Z4) =1÷60×60÷8×64 =8
60s×Z1÷Z2×Z3÷Z4=1m60m×Z5÷Z6×Z7÷Z8=1h