Crane is a kind of lifting machinery, is a for loop, intermittent movement. A cycle of workincludes: extract from extract ground to bring up the product, then move to the designated placedown the items, then the reverse movement, the fetching device back in situ, so as to carry out the next cycle. 起重机属于起重机械的一种，是一种作循环、间歇运动的机械。一个工作循环包括：取物装置从取物地把物品提起，然后水平移动到指定地点降下物品，接着进行反向运动，使取物装置返回原位，以便进行下一次循环。 少不少 少的话追问 别忘了财富值
Crane is a kind of lifting machinery, is a for loop, intermittent movement. A cycle of workincludes: extract from extract ground to bring up the product, then move to the designated placedown the items, then the reverse movement, the fetching device back in situ, so as to carry out the next cycle.
起重机属于起重机械的一种，是一种作循环、间歇运动的机械。一个工作循环包括：取物装置从取物地把物品提起，然后水平移动到指定地点降下物品，接着进行反向运动，使取物装置返回原位，以便进行下一次循环。
少不少 少的话追问 别忘了财富值