机井

chōu yóu jī jǐng wú xiàn shù jù cǎi jí yǔ jiān kòng xì tǒng

抽油机井无线数据采集与监控系统

supervisory control and wireless data acquisition system of pumping wells in oilfield

biàn xié shì chōu yóu jī jǐng xì tǒng xiào lǜ cè shì yí shè jì

便携式抽油机井系统效率测试仪设计

design of portable system efficiency testing instrument for oil drilling well