The flue gas temperature of direct-fired machine is too high to save energy.

直燃机排烟温度过高，不利于节能，在烟道上加设余热回收装置。

youdao

The flue gas temperature of direct-fired machine is too high to save energy.

直燃机排烟温度过高，不利于节能，在烟道上加设余热回收装置。

youdao