... :5 years Echnology & Human resources 1.We own a R& D Center in the United Kingdom which composed of many ... heaters, refrigerator, etc;3.Office space: computers, printers, copiers, scanners, digital cameras, etc;4.Power tools: saws, drilling machines, punching machines ... inverter can be used with a connection to grid or power lines. This type supplies the loading appliances with electric power produced ...