Drilling is to drill a hole in a piece of wood or sheet metal by punching a bunch of two types. Bench to floor by objects that drilling can take the nut hold the two pieces together at the cutting plant in the industry is divided into four types: 1 Plasm asc Cutting 2 Oxyful Cutting
3 Laser Cutting 4. waterjet cutting
Welding The process was used for the material. Most metals and plastics To gather together. Normally used to make pieces and add melted down in a pool of molten metal filling of molten material. When cooled, the joints will be strong. Sometimes the pressure with heat. Or alone To weld
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