The recovery system of residual heat from flue gas can reduce the flue gas temperature of direct-fired machine and increase the primary energy utilization rate of direct-fired machine in summer.
烟气余热回收系统不仅降低了直燃机排烟温度，还提高了夏季直燃机的一次能源利用率。
2
CONCLUSION: Head dilaceration combined with amniotic membrane transplantation in the treatment of primary pterygium has quick recovery, low relapse rate and good cosmetic effect.
结论：头部撕除法联合羊膜移植术治疗原发性翼状胬肉恢复快，复发率低，美容效果好。
3
The floatation-ore concentrate cyanidation process is usually used for vulcanized primary ore and the ores with low silt content and high recoveryrate that are easy to concentrate during floatation.