Profile: Technology Promoters (I) Pvt. Ltd. is a wholesaler of all kind of welding machines like plasma cutting machine, welding rectifier, TIG & MIG welding, laser cutting and CNC cutting machine. Our welding rectifiers/TIG welding is designed to provide DC welding current, ideal for all weldable metal. Micro plasma welding is a gas that is heated to an extremely high temperature & ionized, so that it becomes electronically conductive.