Only if new technique and multiple exploring methods are to be applied in exploring deep gas, will the exploration success ratio be improved so as to reduce the exploration cost.
深层天然气勘探应采用新技术和综合勘探方法才能提高勘探成功率并降低勘探成本。
This specific frequency converter has the advantages of simple hardware, small volume and high ratio of performance to cost. It has applied successfully in AC motor drive of weft storage.
该专用变频器具有硬件简单、体积小、性能价格比高等特点，已成功地应用于纺机储纬器的交流电机驱动中。
Practices indicate it has advanced design, high performance-cost ratio, and wide range of speed, reliable operation, and better portability. The electric control system can be applied to...
应用实践表明，该系统设计先进、性能价格比高、调速范围大、运行可靠、可移植性强，可以广泛应用于各种类型卧式镗铣床的电气控制系统改造。
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