Simplify the following text for a Grade 5 native English-speaking person.
Original: Following the wars , several modern welding techniques were developed , including manual methods like shielded metal arc welding , now one of the most popular welding methods , as well as semi-automatic and automatic processes such as gas metal arc welding , submerged arc welding , flux-cored arc welding and electroslag welding .
Simplified: The most common type of welding that does not use an arc is called gas welding .