Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 388
1568. SWING DERRICK, with fixed boom.Steam hoist. MISCELLANEOUS DEVICES. 379 … 1569. PACKAGE ELEVATOR, for con-tinuous service up or down without reversing.May be arranged for self-dumping both ways.
Mechanical movements
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