Kirkman, Marshall M. (Marshall Monroe), 1842-1921 · New York and Chicago, The World railway publishing company · leaf 447
Fig. 1jChapman Screw Jack. Fig. 2.Joyce Double Movement Screw Jack. for instant use in case of break-down on the road, andunless the screw portion is properly protected, theysoon rust and become unfit for service. Fig. 2 shows a double movement screw jack, whichlifts twice as rapidly as a single…
Locomotives
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