Final answer:
The terms 'workpieces,' 'filler,' 'pool,' 'cools,' and 'joint' are related to welding, a process used to join metal materials with heat and solder.
Step-by-step explanation:
In the given information, the terms 'workpieces,' 'filler,' 'pool,' 'cools,' and 'joint' are related to welding.
Welding is a process used to join metal materials with heat and solder. Different sources of fuel, such as gas, electricity, and laser, can be used in welding.
Forge welding, which has been used for thousands of years by blacksmiths, is a type of welding that joins iron and steel pieces together.