短語詞組短語vacuum m arc furnace 真空電弧爐vacuum remelting arc furnace 真空重熔電弧爐vacuum arc melting furnace 真空電弧熔鍊爐vacuum arc furnace melting 真空電弧熔化爐vacuum arc remelting furnace 真空自耗電弧爐consumable vacuum arc furnace 真空自耗電弧爐vacuum arc degassing furnace 真空電弧脫氣爐vacuum m arc degassing furnace 真空電弧脫氣爐 返回 vacuum arc furnace