... . 4.Sheet metal nonrectangular columns,Coattails groove design,welding more precision. 5.Two hands pneumatic,Have emergency ... 2250Net weight(kg)121kg121kg131kg238kg(Floor)Application fields:(ultrasonic plastic welding equipment): Widely used in the automotive industry, electronic ... , USB connectors,Bluetooth. Toys,stationery: folder, album, folding boxes,PP hollow board,pen loops,ink cartridges, toner ...