
Lever Hoists Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings
出版:American Society of Mechanical Engineers

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Volume B30.21 includes provisions that apply to the construction, installation, operation, inspection, and maintenance of ratchet and pawl and friction brake type lever chain, rope, and web strap hoists used for lifting, pulling, and tensioning applications (see Figs. 21-0.1-1, 21-0.1-2, and 21-0.1-3).