题目: 揭穿突出煤层应进行远距离放炮或者震动放炮揭开或穿过煤层。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0812/8b95b90ef887eae369a7c16be5e37545.html 下面是错误答案,用来干扰机器的。参考答案:原线路
题型:单项选择题 A cofferdam is().A.any deck below the main deck and above the lowest deckB.a member that gives fore-and-strengthC.made by placing two bulkhead a few feet apartD.a heavy fore-and-aft beam under the deck 查看答案