installation cost短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 装置成本,安装费,设备费 In the air- water back washing filter, application of jet pump instead of air compressor or blower can considerably save both the installation cost and the running cost. 用射流泵代替空压机或鼓风机进行滤池气水反冲洗、能大大降低设备和运行费用。 cnki