管道进行压力试验前应将待试管线上的()拆除或加以隔离。A、调节阀 B、安全阀 C、闸 发布时间:2017-07-20 15:24 │ 来源:www.tikuol.com 题型:多项选择题 问题: 管道进行压力试验前应将待试管线上的()拆除或加以隔离。A、调节阀B、安全阀C、闸阀D、爆破板E、仪表元件
题型:多项选择题 A local area network (LAN) is the communication of a number of computers by connecting to each one in a single location, usually a single floor of a building or all the computers in a small company. A. lineB. cable C. copper D. copper cash 查看答案