真正国产乱子伦高清对白_亚州免费一级毛片_国产精品自产拍av在线无码_日韩av一区二区在线观看免费_中文字幕在线观第四页_动漫人物打扑克牌_三级午夜理伦三级_97视频精品全部免费最新_极品少妇午夜福利92_高潮内射双龙视频

四、 Classified by boiler outlet working pressure

1. Low pressure boiler: general pressure is less than 1.275MPa; 2. medium pressure boiler: general pressure is 3.825MPa; 3. high pressure boiler: general pressure is 9.8MPa; 4. ultra high pressure boiler: general pressure is 13.73MPa; 5. subcritical Pressure boiler: general pressure is 16.67MPa; 6. supercritical pressure boiler: general pressure is 22.13MPa.