preliminary calculation meaning in English

初步计算
初算
预算

Preliminary calculations indicated that together , the old and the new pipelines could convey a daily 16 , 000 , 000 gallons of water
初步估计，利用新旧两条输水管，共可从九龙供水系统每天输水1 , 600万加仑往港岛。
In this paper , after analyzing the operation and tests of the air conditioning unit for the rolling stock of shanghai metro line 1 over the last years , a preliminary calculation based on the operation features of the air conditioning unit of the rolling stock of shanghai urban rail " pearl " line is made for the cooling capacity and other parameters of the unit
摘要通过对上海地铁一号线车辆空调的多年运行和试验的分析，针对设计中的上海轨道交通明珠线车辆空调的运动特点，对其制冷容量等参数进行了初步的计算和分析。