This post was last edited by feng*aosa on 2015-9-5 21:08. Catalog of Special Operations (Excerpt): 1. Electrical work refers to operations such as the operation, maintenance, installation, repair, modification, construction, and commissioning of electrical equipment (excluding operations related to connecting to the power system). 1.1 High-voltage electrical work refers to the operations related to the operation, maintenance, installation, repair, modification, construction, commissioning, and testing of high-voltage electrical equipment with a voltage of 1 kilovolt (kV) or higher, as well as the testing of insulating materials and tools. 1.2 Low-voltage electrical work refers to the tasks of installing, debugging, operating, maintaining, repairing, upgrading, and testing low-voltage electrical equipment with a voltage of 1 kilovolt (kV) or less. 1.3 Explosion-proof electrical work refers to the tasks of installing, repairing, and maintaining various explosion-proof electrical devices. Suitable for explosion-proof electrical work other than in coal mine shafts. 2 Welding and thermal cutting operations refer to operations that involve processing materials using welding or thermal cutting methods (excluding the operations specified in the Regulations on the Safety Supervision of Special Equipment). 2.1 Fusion welding and thermal cutting operations refer to processes in which local heating is used to heat the metal or other materials at the joint to a molten state, thereby enabling welding and cutting. Suitable for gas welding and cutting, shielded metal arc welding and carbon arc gouging, submerged arc welding, gas shielded welding, plasma arc welding, electroslag welding, electron beam welding, laser welding, oxygen-fuel cutting, laser cutting, plasma cutting, and other processes. 2.2 Pressure welding refers to the welding process that is carried out by applying a certain amount of pressure during welding. Suitable for resistance welding, gas pressure welding, explosive welding, friction welding, cold pressure welding, ultrasonic welding, forge welding, and other processes. 2.3 Brazing refers to the process in which a filler material with a melting point lower than that of the base material is used. The workpiece and the filler material are heated to a temperature higher than the melting point of the filler material but lower than that of the base material; the liquid filler material then wets the base material, fills the gaps in the joint, and diffuses with the base material to achieve the joining of the workpieces. Suitable for flame brazing, resistance brazing, induction brazing, dip brazing, and furnace brazing; does not include soldering. 3 Work at height refers to work that is carried out specifically or regularly at heights of 2 meters or more above the reference level for potential falls. 3.1 Working at heights refers to tasks involving the erection or dismantling of scaffolds or access structures at elevated positions. 3.2 Work involving installation, maintenance, and demolition at heights refers to tasks of installation, maintenance, and demolition carried out at elevated positions. Suitable for using specialized equipment for interior and exterior decoration and cleaning of buildings, installation of electrical and telecommunications lines, installation of pipes at heights, installation and maintenance of small air conditioners at high locations, installation, inspection, and maintenance of various equipment and facilities as well as outdoor advertising installations, as well as carrying out demolition work on buildings and equipment at heights. 6 Safe Operations in Metal and Non-metal Mines 6.1 Ventilation Operations in Metal and Non-metal Mines Refer to the installation of local ventilators underground, the operation of main surface fans, local ventilators, and auxiliary ventilators underground, the operation and maintenance of mine ventilation structures, the implementation of dust control measures underground, ensuring the proper functioning of the mine ventilation system, and providing local ventilation to prevent poisoning, asphyxiation, and dust problems. 6.5 Pillar work in metal and non-metal mines refers to the operations of checking the stability of the roofs and sides of shafts, tunnels, and mining areas underground, removing loose rocks, and providing support. 6.6 Electrical work in underground metal and non-metal mines refers to the tasks of installing, debugging, inspecting, maintaining, and troubleshooting mechanical and electrical equipment in such mines, with the aim of ensuring the safe operation of said equipment. 6.7 Drainage operations in metal and non-metal mines refer to the tasks involved in the daily use, maintenance, and inspection of drainage equipment in such mines. 6.8 Blasting operations in metal and non-metal mines refer to blasting activities carried out in open-pit and underground environments. 11 Other operations identified by the General Administration of Work Safety