欧美精品久,亚洲精品日本无v一区,欧美视频精品在线观看,国产日韩中文字幕,欧美成人免费一级人片100 ,午夜**毛片免费网站,久久久久久久久99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.