Branch air headers shall be of brass (15 mm dia. minimum) and shall run vertically from the header to the instrument.

科空气标题应为黄铜(15毫米直径最小)，并应垂直运行从头到仪器。

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Valve Stand: Support air supply header and various takeover points, flex hoses, gauges, valves, etc.

阀架上面安架空气接头，各种转换点，软管，计量表，阀门等。

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When the defender faces an attacker in the air, he focuses on trying to force a header from a bad (or even really bad) Angle.

当后卫攻击者所面临的空气，他的重点是试图迫使标题从坏(或什至非常糟糕)的角度。

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Hamilton had the best chance of the game thus far when a Stevenson header was won in the air by Simon Mensing, who knocked the ball onto Offiong, but the striker failed to keep his header under the bar.

BBC: Inverness CT 0-1 Hamilton Accies

Having given warning of his power in the air with an effort over the bar, Crespo adjusted his radar to flight a header beyond Howard moments later.

BBC: AC Milan striker Hernan Crespo celebrates his goal

Tall, elegant and powerful, Ronaldo is as good in the air as he is with the ball at his feet, as he proved with his header against Chelsea in last year's final.

CNN: Profile: Cristiano Ronaldo