国产人妻互换一区二区水牛影视,亚洲精品白浆高清久久久久久,国产免费又色又爽粗视频,国产伦精品一区二区三区免.费,国产无遮挡又黄又爽免费网站

The newly-built building association uses without authorization without receiving fire control funds or passing the acceptance. The site did not apply to the fire department for fire safety inspection before use. The use of automatic control inevitably causes "congenital" hidden dangers. There are many electrical equipment and fire sources, which are easy to cause fire. For places with concentrated personnel, the State Council issued the regulations on the safety management of large-scale mass activities, the main contents of which are as follows: (1) strengthen education and training and improve the ability of self prevention and rescue. Implement the system of certified employees

Insulator is a device installed between conductors with different potentials or between conductors and ground potential elements, which can withstand voltage and mechanical stress. It is a special insulation control, which can play an important role in overhead transmission lines. In earlier years, insulators were mostly used for electric poles. Slowly, many disc insulators were hung at one end of the high-voltage wiring tower. It is used to increase the creepage distance. It is usually made of glass or ceramic, called insulator. The insulator shall not fail due to various electromechanical stresses caused by changes in environment and power load conditions, otherwise the insulator will not have a significant impact and will damage the service and operation life of the whole line.

Insulators are used to support and fix busbars and live conductors, and provide sufficient distance and insulation between live conductors or between conductors and ground. The insulator shall have sufficient electrical insulation strength and moisture resistance.

Insulator is a special kind of insulation control, which can play an important role in overhead transmission line. In earlier years, insulators were mostly used for electric poles. Slowly, many disc insulators were hung at one end of the high-voltage wiring tower. It is used to increase the creepage distance. It is usually made of glass or ceramic, called insulator. The insulator shall not fail due to various electromechanical stresses caused by changes in environment and power load conditions, otherwise the insulator will not have a significant impact and will damage the service and operation life of the whole line.