Mainly In spot welding & resistance welding two type welding machines are used :- 1. Air Cooled & 2. water Cooled.
it is trouble free and can work long hours, the only problem is the weight
what changes take place when water is heated or cooled
what changes take place when water is heated or cooled
Early machine guns such as Maxim and Vickers were water cooled and had distinctive jackets around their barrels, except models intended for installation on airplanes. Most later machine guns are air cooled to make them lighter and more portable.
manufaturey
density changes when the substance changes.
Browning m1917 water cooled browning m1919 air cooled browning m2 .50 caliber machine gun
Riveting - when a solid fastener is placed in a drilled hole and expanded to hold an object in place. Welding - when a thin wire ('filler') is melted along with the area of bonding on the workpieces, which form a joint when cooled.
The steam when cooled changes back to liquid water
Both air cooled and water cooled machine guns have been made.
By the development and manufacture of lighter, air cooled machine guns.