Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, Comstock · leaf 109
■=o^ … Fig. 49.* Section of Moran Air-Lock. tion of Air. Daniel C. Moran. In operation it is similar in principleto the ordinary river-lock, in that one door is always closed, thusmaintaining the pressure in the working chamber with a minimumof leakage. From the figure it will be observed that the two…
Building · Carpentry · Masonry
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