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Air-entrained concrete

a low-density type of concrete throughout which small air bubbles are dispersed in order to increase its frost resistance: used for making roads. With 1 per cent of air, the loss of strength is approximately 5 per cent


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  • Air-intake

    noun an opening in an aircraft through which air is drawn, esp for the engines the amount of air drawn in the part of a carburettor or similar device through which air enters an internal-combustion engine any opening, etc, through which air enters, esp for combustion or cooling purposes Historical Examples The air-intake dust screen […]

  • Air-lift pump

    noun a pump that pumps liquid by injecting air into the lower end of an open pipe immersed in the liquid: often used in boreholes

  • Air-sea rescue

    noun an air rescue at sea

  • Air-shipped

    to send or ship via aircraft: to air-ship machine parts overseas.

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