The technology uses deep penetration perforation charge with high perforation density and large perforation diameter and surging perforation with greater pressure differential.
它采用高孔密大孔径深穿透射孔弹和大压差抽吸炮眼清洗技术，不仅能提高油井产能，解除近井带污染，还可以改善防砂完井效果。
In the greenhouse, by conducting pot and field experiments, the diagnosis method of crop moisture content from variable differential in stem diameter of tomato was studied.
在温室条件下，盆栽和小区试验相结合，进行了用番茄株茎直径变差法诊断其水分状况的试验研究。
The study of oxide-aperture influence on threshold current and differential resistance shows that lower threshold current can be obtained with a smaller oxide-aperture diameter.
研究了氧化孔径对阈值电流和微分电阻的影响，结果表明较小的氧化孔径可以获得低的阈值电流。
According to Terzaghi consolidation theory, the partial differential equation and filtration formula of the change diameter screw compression were induced.
根据太沙基固结理论推导出了变径螺旋压榨压方程，得出了压榨速率的表达式。
According to Terzaghi consolidation theory, the partial differential equation and filtration formula of the change diameter screw compression were induced.
根据太沙基固结理论推导出了变径螺旋压榨压方程，得出了压榨速率的表达式。
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