1. Yebetumi ayɛ nhwehwɛmu na yɛayɛ nhyehyɛe wɔ akwan horow te sɛ arc welding, spot welding, projection welding, stud welding, laser welding, ne laser twa ama adetɔfo nipadua-wɔ-fitaa afã horow.
2. Yɛwɔ adwuma no sohwɛ nhyehyɛe a ɛho akokwaw (nkɔso sohwɛ nhyehyɛe, su pa sohwɛ nhyehyɛe, ne ɛka sohwɛ nhyehyɛe).
