日本免费三精品,国产亚洲成AⅤ人片在线观看嫩草,AV在线免费播放一区,日本午夜两性视屏

The reactor body is made of low-temperature resistant high-strength stainless steel, which can withstand a low temperature environment of -196 degrees. Conventional rock wool insulation is used outside the jacket. For lower temperatures, a vacuum insulation jacket is added outside the refrigeration jacket to isolate air heat transfer and continuously maintain the low temperature in the kettle.