The single screw oil pump is a new type extracting oil pump, which is simple in structure and high in performance with low workingcost.
单螺杆抽油泵是一种新型的采油泵，结构简单，性能可靠，作业成本低。
2
How to use scientific management to raise the quality and prolificacy of products, and how to reduce workingcost, have being paid more attention by the die-casting factories.
如何进行科学管理，从而提高压铸件质量和生产率、降低运营成本，越来越得到各压铸生产单位的重视。
3
Tower cooling in winter and transitional seasons can reduce the whole year operating time of the water chiller and reduce workingcost, and the fine economic benefit can be gotten.