Main microorganism organism of ni was gram negative rod.
NI病原菌主要为革兰阴性杆菌。
Rod fatigue rupture is one of its main failure forms.
抽油杆的疲劳破坏是抽油杆柱的主要失效形式之一。
Maintenance and service: Screw rod air compressor's maintenance main engine overhaul.
维修和服务：螺杆空气压缩机的维修，主要发动机大修。
Rod pumping is a main artificial lift oil production method in petroleum industry.
有杆泵采油是石油工业传统而占主导地位的人工举升采油方式。
Rod pumping is a main artificial lift oil production method in petroleum industry.
有杆泵采油是石油工业传统而占主导地位的人工举升采油方式。
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