动车组电气系统的绝缘性能是通过测量设备或电路的电阻及设备/电路接地之间的绝缘电阻值进行判断的。
多层厂房发生火灾后,若报警晚,往往形成立体火灾。
In order to remove the carbon deposit from the threaded recess, we can use() a driver。 a scraper。 a tap。 a file。
动车组必须专列回送,每列编组不得超过16辆。
Waste oil should() be treated according to the C-Es command exactly。 be treated according to MARPOL。 accumulate in bilges or on tank tops in accordance with MARPOL。 discharge to sea at the specified area。
Any extinguishing agent used on a Class “C” fire must have which important property? ()