Fitter on ship and gives ideas for pipe fabrication, welding techniques, overhauling ship machineries ether mechanical or electrical drive , and also lathe machine on how to operates and making various job specially on threading jobs, making flanges, pumps bushing etc. .air condition technician and pipe fitters, making elbows in different degrees and reducer eccentric and concentric and metal fabrication, such as air duct, air venting mushroom and various modification