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Among the smaller capacity cars, the most popular and most widely used are
the gravity dump types, such as rocker dump and scoop cars, designed so
that the weight of the load tips the body when a locking latch is released
by hand. The body of this type is balanced to right itself after the load
is discharged. Rocker dump cars range in capacity from 1 yd3
(0.76 m3 ) handloaded types, to units of 10 yd3 (7.6 m
3 ) for power shovel loading. Pit and Quarry
Source:
Dictionary of Mining, Mineral, and Related Terms
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