GOYANG, Gyeonggi Province — Last month, a worker in Boryeong, South Chungcheong Province, fell backward from a crane platform roughly 4 meters off the ground. In the seconds that followed, an airbag vest sensed the fall and deployed around his neck, spine and head — limiting what could have been a fatal injury to a fractured arm. The vest, developed by Safeware, was among the artificial intelligence-powered safety devices on display Wednesday at the Korea International Safety & Health Show at KINTEX in Goyang, Gyeonggi Province, where 320 companies gathered as Korea marks Occupational Safety and Health Month. The event run through Friday. A demonstrator dropped a mannequin from a stool to show how the vest works, the airbag deploying in an instant around its neck and shoulders, turning what could have been a hard, head-first impact into a soft landing. "We receive about 30 such life-saving reports each year," a company official said. A few booths away from the airbag vests, a four-legged robot paced across a circular stage, its joints flexing as nuclear engineers explained how it is