a system of ropes and pulleys繩索滑輪系統(tǒng)Levers and pulleys are simple machines.杠桿和滑輪是簡單機械.Among them were rickshaw pulleys, peddlers, policemen and servants.這些人有的拉車,有的做小買賣, 有的當(dāng)巡警,有的當(dāng)仆人....
Block and tackle: Combination of pulleys with rope or cable, commonly used to augment pulling force.滑輪和滑車組: 帶繩索和纜繩的滑輪組, 通常用于增大拉力.Levers and pulleys are simple machines.杠桿和滑輪是簡單機械.Among them were rickshaw pulleys, peddler...