In this article, the calculation of heatingload, the selection of heating system and how to charge are discussed.
文章就热负荷的计算，供暖系统的选择及热费收取等方面进行了探讨。
2
The main purpose of this paper is to the principles of the circuit and the shaking machine. loadcalculation. the choice of the motor and the heating-wire power for dissolving trunk of manna alcohol.