短语词组短语fire trench welding 锻焊fire cracker welding 焊条预置式焊法;[机]躺焊;焊条预置武焊法;躺焊surfacing by fire cracker welding 躺板极堆焊fire -crair conditioningker welding 躺焊fire welding cable 电 返回 fire welding