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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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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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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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