短語詞組短語electron -beam welder -beam welding machine 電子束焊機electron generally beam welding 電子束焊接activating electron -beam welding 活性電子束焊接programmed electron -beam welding 程控電子束焊接electron beam welding machine 電子束焊接機;[機]電子束焊機vacuum electron beam welding 真空電子束焊 返回 electron beam welding