... overhauling and renovation of Air Pollution Control Equipment such as Electrostatic Precipitators, Fabric Filters, Pneumatic Conveying Systems and ... , fabricated parts, welded steel structure parts, spirals & springs, kitchen utensils,Spirals for snack vending machine and appliances ... grinding, drilling, shearing machines; different welding machines such as TIG, CO2 shield and AC/DC, Spot-Welding etc. ...