In this paper, compared with hot water heating system and steam heating system, it was found that hot water heating system have more advantages which are stability, safety and healthy.
通过比较热水供热系统和蒸汽供热系统的优缺点，发现热水供热系统更具有运行稳定、安全和卫生等优点。
The best formula of 40% acetochlor emulsion in water was ascertained and its particle size was measured. The cold and hot storage stability of the preparation were also studied.
本文通过实验确定了40% 乙草胺水乳剂的最佳配方，并对其粒径进行了测定，研究了其冷、热贮稳定性。
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