This paper analyzed the influence of mining depth, coal seam dip, mining height and face length on depth of floor water-conductive fissure zone.

综合分析了开采深度、煤层倾角、煤层开采厚度、工作面斜长等地质采矿条件对底板采动导水破坏带深度的影响。

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This paper introduced the fast detection device of acting length of the sealing face which is suitable for on line detection of inlet and exhaust valve of the engine.

本文介绍了密封面作用长度的快速检测装置，此装置适用于发动机中进排气门的在线检测。

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The effects of cutting area, contact arc length, the geometry of cutting face, back dip angle of PDC cutter and rock performance on force of PDC cutter breaking rock were simulated experimentally.

试验模拟了切削面积、接触弧长、切削面形状、切削齿后倾角和岩石性能对PDC切削齿破岩受力的影响。

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Two top class US-born and bred goalkeepers who followed in the footsteps of Kasey Keller came face to face (if you can come face to face given a pitch length of 110 yards) on Saturday at Goodison Park in Liverpool.

FORBES: US Players Friedel And Howard Are Definitely Keepers

But the Leinster defence managed to scramble back after a length-of-the-field chase and prevent the try as the hosts put a smile back on the face of Irish rugby after the Emerald Isle's torrid World Cup campaign.

BBC: Leinster 22-9 Leicester