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  2. Concentric reducer - Wikipedia

    en.wikipedia.org/wiki/Concentric_reducer

    A concentric reducer is used to join pipe sections or tube sections on the same axis. [1] The concentric reducer is cone -shaped, and is used when there is a shift in diameter between pipes. [ 1 ] For example, when a 1" pipe transitions into a 3/4" pipe and the top or bottom of the pipe doesn't need to remain level. [ 2 ]

  3. Eccentric reducer - Wikipedia

    en.wikipedia.org/wiki/Eccentric_reducer

    Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. The gradual accumulation of air in a concentric reducer could result in a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump. Eccentric reducers exhibit a unique design with one side having ...

  4. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    A reducer reduces the pipe size from a larger to a smaller bore (inner diameter). Alternatively, reducer may refer to any fitting which causes a change in pipe diameter. [15] This change may be intended to meet hydraulic flow requirements of the system or adapt to existing piping of a different size. The reduction length is usually equal to the ...

  5. Caliber conversion device - Wikipedia

    en.wikipedia.org/wiki/Caliber_conversion_device

    One exception to the use of a special lightweight bolt was the Colt Service Ace, offered as a complete pistol or as a conversion kit for the M1911. While still nominally a blowback conversion, the Service Ace used a special "floating" chamber in the barrel that acted like a gas operated firearm's piston, helping push the bolt back with more ...

  6. M40 recoilless rifle - Wikipedia

    en.wikipedia.org/wiki/M40_recoilless_rifle

    The M40 recoilless rifle [17] [18] [19] [20] is a portable, crew-served 105 mm recoilless rifle made in the United States.Intended primarily as an anti-tank weapon ...