This lightweight hand-held instrument is an effective warning device for staff working in areas that can contain combustible gases.

这种轻型手持式测试仪对在可能存在易燃气体区域内工作的人员来说是有效的可燃气体警报装置。

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The air conditioning engineer can get the probes calibrated without having to send in the hand-held instrument (e. g. at Testo Industrial Services).

空调工程师可以得到，而无需在手持式仪器(如德图工业服务)发送校准探头。

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However, a pilot can only choose to fly IFR if they possess an instrument rating which is above and beyond the basic pilot's license that must also be held.

然而，如果飞行员持有的仪器等级在其必须持有的基本的飞行员执照等级之上，那么飞行员只能选择仪表飞行规则。

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Everybody agreed two years ago that it was a perfect instrument, and held hands together and supported it.

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He served as managing director and co-head of the U.S. Buyout Fund from 2003 to 2009, chief executive of XO Communications from 1999 to 2003, and held top stops at Nextel Communications and General Instrument.

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As soon as he held it in his hand, he put the instrument's mouth to his lips, like a thirsty person grabbing at a bottle of water and pressing it to his mouth.

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