Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 368
Fig. 139. Ransome ConcreteHoist-Bucket. … Fig. 140. Sterling Contractors Wheelbarrow. conveying men are waiting, he is very apt to discharge the concretebefore it is thoroughly mixed, in an effort to keep all the men busy.A platform is built at the elevation of the top of the hopper, throughwhich the materials are fed to the mixer, Fig.…
Architecture · Building
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