As the hydraulic drive system rotates the chains, the gripper blocks feed the tubing string into, or out of the well.

当液压传动系统使链转动时，夹块将挠性管柱送入井内或将它从井内带出。

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The side-abrasion failure of rod string for polymer drive pump wells is analyzed by using computer simulation method. The extension of fuzzy reliability analysis is expanded to mechanical system.

将计算机数字仿真技术引入聚驱井管杆偏磨失效模糊可靠性分析中，把模糊可靠性的分析范围扩展至机械系统。

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As he leaves the playing field for the last time, we will remember him for a magnificent string of results in 2004 and 2005, plus his signature stroke: that exquisite cover-drive.

BBC: Reaction to Vaughan's retirement

It never looked like being Boro's day from the moment Brazilian striker Afonso Alves crashed a drive from the edge of the box against the bar in the first half as a string of chances failed to produce the elusive goal.

BBC: Stewart Downing

Still, nothing could dampen the thrilling views on the west and north sides of the building (especially from the 2, 000-plus-square-foot Kohinoor Suite), which take in the entirety of the Queen's Necklace, the stretch of Marine Drive running along the city's Back Bay that, when lit up, truly resembles a vast string of pearls--one of the urban wonders of the world.

FORBES: The Oberoi, Mumbai