After morning meeting victim start weld bead grinding. (solo-work)
Other person(=Y) saw the victim worked at bead grinding machine.
Person in charge of safety(=H) of in-plant subcontracting company patrolled in Genba,
he discovered the victim was caught by steel material in material supply table.
H and Y started to rescue the victim.
They created clearance with hoisting steel by crane and rescue him.
Called ambulance and it came at 10:47
Victim was transferred to hospital.
Confirmed his death at hospital.