词汇	union join
释义	union join 并联结
随便看	welding track welding tractor welding training welding training system welding transformator welding transformer welding-transformer welding transformer power source welding tub welding tube Welding undercut welding under low temperature welding unit welding up welding-up composite straighting roll welding upward and downward welding variable welding variables welding vehicle welding voltage welding voltage between electrodes welding ways welding wheel welding with backing welding with flux backing