韩国美女青草仙桃视频在线观看_亚洲精品一二三在线观看无修改_国产精品无码露脸视频观看_成人爽片不卡视频在线_无码吃奶揉捏奶头高潮视频在线

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.