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Purpose Excavator 46 The Drag Line Excavator 52 The Long Jib Full
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approximately Blue Lias bogies boiler bolted brake brake band bucket arm bucket capacity bucket teeth Bucyrus canals caterpillar tracks cent centre chains clay clutch band coal constructed cost crude oil engine crushers cubic yard bucket cubic yards capacity cylinder depth diameter digging discharging drag line Drag Line excavating drag-line bucket drilling driven drum dumping electrically operated machines explosives face feet long fitted fuel full circle machine full circle shovel grabbing cranes hand labour heavy holes hopper Illus inches internal combustion internal combustion engine jib head lip plate loading Long Jib Shovel lubricated machinery makers material means mineral motors mounted Navvy necessary obtained opencast petrol power shovel pulley quarry radius rail wheels railroad type shovel renewals rock rollers Ruston sand shaft shale small machines speed steam engines steam machine Steam Shovel steel suitable timber tubes usually valve vary vertical wagons wear weight wire rope