Simple past tense and past participle of weld.(verb)
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Use "welded" in a sentence
"I have a 1/2 thick x 6 inches round steel 'plate' with a loop of log chain welded to the back."
"State investigators found it blew apart along cracks in welded areas that could have been identified years earlier had planned inspections correctly taken place per the company's safety protocols."
"Schools, universities and researchers are about to fall by the sword welded by Gelmini in order to become part of a failing corporate culture."