How to calculate a width of a crane, so it won't tip over
Crane stability(二)
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Cassier's magazine. FIG. l8.—A 30-TON STEAM TRAVELLING CRANE BUILT BY MESSRS. RANSOMES & RAPIER, LTD., LONDON SPECIAL FORMS OF CRANES 399. STONEY PATENT TIPPING CRANE MADE BY MESSRS. RANSOMES & RAPIEIWATERSIDE