The ballute is internally provided with a soft intake pipe which is connected with the compressed air chamber in the truck.

气伞内置软状进气管，与车内压缩空气室连接。

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But engineers are hoping that their pretesting—using compressed air to fire a ping-pong ball down the pipe, Gillies says—will prevent such a mishap.

但工程师们希望他们的预测试——使用压缩空气将乒乓球注入管道——也许可以避免此类事故， Giilies 认为。

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A machine called a snow gun mixes cooled water and compressed air. A pipe carries water into the gun from a lake or pond.

叫做雪枪的机器混合水合压缩空气，一根管子从湖或池塘把水输送到雪枪。

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This somewhat dangerous device had a six foot barrel, was made out of PVC irrigation pipe of varying diameters, and was powered by compressed air.

FORBES: The Supersonic Ping-Pong Gun