Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 920
to be carried through the previouslyconstructed portion of the tunnel,when no other means of access to 4153. … the work exists. For this purposethey may be mounted on suitablecarriages or trucks. These lastconsist of two independent plates,each having two wheels, and detachably clamped to the ends of the sections by a bolt, so that a sec-tion of the tube forms a portion of the truck itself when in working…
Mechanical engineering -- Dictionaries
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