硅青銅silicon bronze硅鎮(zhèn)流電焊機silicon rectifier welder硅整流弧焊機silicon rectifier arc welder硅整流弧焊機silicon rectifier archway welder軌道車rail car軌距gauge貴金屬noble metal貴金屬precious metal貴金屬催化劑noble metal catalyst貴金屬催化劑noble metal catalyst輥鍛roll forging輥鍛機forging roll輥鍛機roll forging machine滾齒gear hobbing滾齒機hobbing machine滾刀刃磨床hob edge grinding machine滾刀刃磨床hob grinding machine滾點焊roll spot welding滾動花鍵球籠式萬向節(jié)ball spline rzeppa universal joint滾動阻力rolling resistance滾動阻力rolling resistance滾鍍barrel plating滾對焊butt seam welding滾光tumbling滾焊seam welding