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young black haired girl posing with heavy construction equipment vehicles of various types
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Young Black Haired Girl Posing With Heavy Construction Equipment Vehicles Of Various Types

"Until almost the twentieth century, one simple tool constituted the primary earthmoving machine: the hand shovel - moved with animal and human powered, sleds, barges, and wagons. This tool was the principal method by which material was either sidecast or elevated to load a conveyance, usually a wheelbarrow, or a cart or wagon drawn by a draft animal. In antiquity, an equivalent of the hand shovel or hoe and head basket—and masses of men—were used to move earth to build civil works. Builders have long used the inclined plane, levers, and ignorant to place solid building materials, but these labor-saving devices did not lend themselves to earthmoving, which required digging, raising, moving, and placing loose materials. The two elements required for mechanized earthmoving, then as now, were an independent power source and off-road mobility, neither of which could be provided by the technology of that time."
Container cranes were used from the 1950s and onwards, and made containerization possible.

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Filename:517194.jpg
Album name:Babes
Rating (2 votes):55555
Keywords:#young #black #haired #girl #posing #heavy #construction #equipment #vehicles #various #types
Filesize:324 KiB
Date added:Nov 07, 2012
Dimensions:984 x 1440 pixels
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