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351M Electric Shovel 305M Crawler Dragline Marion Power Shovel Company was an American firm that designed, manufactured and sold steam shovels , power shovels , blast hole drills , excavators , and dragline excavators for use in the construction and mining industries.
From 1985 onwards, all new machines carried the 'RB' name instead of 'Ruston-Bucyrus', and in 1987, a new mechanical/hydraulic powered 51–60 model developed from the 38-RB was offered for use as a crane or dragline excavator [1] In 1990, RB bought from its rival Priestman, the design and manufacturing rights to Priestman's Variable ...
Rock drill mounted on a tripod. The large objects on the legs are weights to anchor it down into position. In reciprocating power drills, the drilling cylinder is mounted on a feed-screw, such that as the hole is drilled and the drilling point recedes from the rock face, the drill-bit continues to move into it, while the anchor point (on the tripod or column) remains in place. [11]
Electric mining shovels – with working weights in excess of 1,645 tons / 1,492 metric tons and powered by electric motors linked to planetary and case-type transmissions, P&H electric can move up to 120 tons / 109 metric tons of material every 30 seconds from the mine face into the waiting tray of a nearby haul truck or in-pit crushing ...
Demolition with hydraulic claw, cutter and breaker attachments; Mining, especially, but not only open-pit mining; River dredging; Hydro excavation to access fragile underground infrastructure using high pressure water; Driving piles, in conjunction with a pile driver; Drilling shafts for footings and rock blasting, by use of an auger or ...
A bulldozer or dozer (also called a crawler) is a large, motorized machine equipped with a metal blade to the front for pushing material: soil, sand, snow, rubble, or rock during construction work. It travels most commonly on continuous tracks , though specialized models riding on large off-road tires are also produced.
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