亚洲东京热无码视频,亚洲AV无码乱码在线观看一区,免费国产精品自产拍,99热这里都是国产精品

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.