Saturday, September 17, 2022
Saturday, September 17, 2022
Saturday, September 17, 2022
Tuesday, September 13, 2022
Saturday, September 17, 2022
冬季使用氧气瓶时,瓶阀可能有冻结的现象,可以用火焰烘烤解冻。...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
安装减压器之前,要略打开氧气阀吹除污物。在开启瓶阀时,瓶阀出气口...
Tuesday, September 13, 2022
Sunday, May 7, 2023
液化石油气的火焰温度比乙炔火焰的温度()。A、低B、相等C、高...
Wednesday, April 5, 2023
Saturday, August 19, 2023
Saturday, December 9, 2023
Saturday, September 17, 2022
Saturday, September 17, 2022
为保证保护接零的导线在发生短路时不熔断,其导电容量应离焊机最近处的保险丝额定电流的()。A、1.5倍B、2.5倍C、3倍D、4倍...
Monday, February 5, 2024
Tuesday, September 13, 2022
Saturday, September 17, 2022
根据国际GB9488-88中的规定,氧气胶管为红色,乙炔胶管为黑...
Saturday, September 17, 2022
()和氯、次氯酸盐等化合会发生燃烧和爆炸。A、氮气B、氢气C、乙炔...
Wednesday, March 1, 2023
通过人体的电流越大,引起心室颤动所需的时间越短,致命危险越大。...
Tuesday, September 13, 2022