They select a set of instruments to provide test signals and make measurements and then bolt the instruments into a standard, 19-in. rack.

他们选择一套设备来提供测试信号和度量，然后将这套设备固定在一个19英寸的架子上。

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Another common obstacle on vehicle Windows is the set of bolt caps that hold some Windows in place.

车辆窗户上的另一个常见障碍物是用来固定窗户的螺帽。

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Safety bolt is set on the valve body, when the pressure in the cylinder is too high, safety diaphragm will burst automatically to ensure the safety accident cases, for the safety of the bottle.

瓶阀体上设安全螺栓，当气瓶内压力过高时，安全膜片将自动爆破泄压以确保意外情况下瓶的安全。

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Bolt shattered his old mark by 11-100ths of a second to set the new world record of 19.19 seconds.

VOA: standard.2009.08.21

Bolt talks about when he knew he would set a new record.

VOA: standard.2009.08.21

Three years ago Bolt set the 100m world record after running 9.58 secs at the World Championships.

CNN: Lightning strikes twice as Blake beats Bolt again

Bolt set five world records on his way to winning the 100m, 200m and 4x100m in Berlin and in Beijing before that.

BBC: Bolt keen to compete in long jump

Bolt set a new Olympic record with his 9.63 seconds run on Sunday, just as he did when he claimed his first title four years ago in Beijing.

BBC: Usain Bolt life-size model made by Ferndown children