调查了胜利油田第三区油层排出水和原水样的微生物学和水化学的变化。
Microbiological and hydrochemical changes in water samples from the source and flooded petroleum horizons at the third area of Shengli Oil Field were examined.
后备继电系统将设置第一、第二与第三区方向距离继电器，以防相位故障与接地故障。
The backup relaying system will have first, second, and third zone directional distance relays for protection against phase and ground faults.
秘书长需在二十八天内，将所有变更事项以书面通知社团注册处及国际业馀无线电联盟第三区秘书处。
The secretary will submit to the registrar of societies and to the secretariat of iaru region 3, within twenty - eight days written notice of any alterations made.
秘书长需在二十八天内，将所有变更事项以书面通知社团注册处及国际业馀无线电联盟第三区秘书处。
The secretary will submit to the registrar of societies and to the secretariat of iaru region 3, within twenty - eight days written notice of any alterations made.
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