Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry (1921)
Wright, Roydon Vincent, 1876- ed, Little, John G., joint ed, Augur, Robert C., joint ed · New York, N.Y., Simmons-Boardman Publishing Co · leaf 235
r winch secured between the; polesnear the base of the derrick. The breast type is used inthe same way as the pole derrick but, having greater sta-bility, can be used for heavier work. Tripod Derrick The tripod derrick is used in the same class of work asthe pcle or the breast types but requires no…
Hoisting machinery · Conveying machinery
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
