Certain corrective actions of this guide may not be feasible with the Compact Ball Valve (sealed unit).

对于紧凑型球阀(密封装置)，本指南的某些纠正措施可能并不可行。

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The initial investigation indicates an air-conditioning unit crashed through the ceiling and sent air rushing in, creating a ball of fire.

初步的报告显示一台空调装置撞穿了天花板令空气涌入，造成一个火球。

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An "economic miracle" : KUVE four-row ball type profiled rail unit with large number of variants and accessories conquers the market.

一个“经济奇迹”：KUVE四列球型异型轨单位，大量的变异及配件征服市场。

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For example, the NFL moved kickoffs from the 30-yard line to the 35 beginning in 2011, and also required the coverage unit to start within 5 yards of the ball, closing the distance between the teams.

FORBES: NFL's Elimination of Kick-Offs: Selfless Concern or Self-Preservation

Using the Sokka unit basically involves kicking a ball against a flat playing surface containing a number of electronic sensors that monitor accuracy and technique.

BBC: Kevin Keegan launches football training systems