circulating pumps的用法和样例：
例句
- With the common problems in projects, presents the optimal design of circulating pumps.
结合工程常见问题，提出了循环水泵的最优化设计。 - Economics is studied on steam injector substituting the tube-shell heat exchanger and the circulating pump in the heating system of the thermal power plant.
针对热电厂供热系统采用升压加热装置改造热网加热器和循环水泵的可行性和经济性开展了研究。
