The agglomeration and sintering of fine particles can necessitate a lowering in temperature of operation.
由于微粒易于聚集和烧结，不得不降低操作温度。
The implementation of the optimized design scheme has provided an effective way for the ventilation and temperature lowering in the deep mining in China.
方案的实施为国内深井开采通风降温技术提出了一条比较有效的途径。
Method Large diameter oil tube and weighting rod are adopted to decrease lifting resistance of crude oil and to increase lowering-in energy of the string.
方法采用增大油管直径和下加重杆技术，来减少油流上升阻力和增大杆柱下行动力。
Backfilling the trench following the lowering-in of the pipe is carried out by angledozers or backfilling attachments to tractors.
管子下入管沟后，由侧铲推土机或装有回填附件的拖拉机回填管沟。
Backfilling the trench following the lowering-in of the pipe is carried out by angledozers or backfilling attachments to tractors.
管子下入管沟后，由侧铲推土机或装有回填附件的拖拉机回填管沟。
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