婷婷成人亚洲综合国产_51ⅴ精品国产91久久久久久_欧美日韩精品免费一区二区三区_欧美一级毛一区二区三区_亚洲综合久久久中文字幕_国产精品美女在线

Made vertical vacuum annealing furnace, mainly used for high-speed steel M2, M42, M51 and other wire annealing. The device uses an automatic lifting loading mode, the heating process control technology, strong circulation cooling system, computer control and acquisition, processing and recording data and other advanced technologies. High speed just after annealing bright, internal uniformity, no oxidation, decarbonization.