塔机提升和降落速度应均匀,左右回转动作应平稳。严禁忽快忽慢和突然制动。当回转未停稳时 发布时间:2019-02-02 09:11 │ 来源:www.tikuol.com 题型:判断题 问题: 塔机提升和降落速度应均匀,左右回转动作应平稳。严禁忽快忽慢和突然制动。当回转未停稳时,不得作反向动作。
题型:判断题 Henry’s father and five other black people were also registered to vote that night.A.TrueB.False 查看答案