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Mining
Of or pertaining to the process or business of extracting materials, such as ore or minerals, from the earth's crust.
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Mining > Mining tools 
Mohs scale
Mining; Mining tools
A scale used to measure and compare the hardness of minerals based on how easy it is to scratch them.
placer deposit
Mining; Mining tools
A placer deposit or placer is an accumulation of valuable minerals formed by gravity separation during sedimentary processes. Placer mining is an important source of gold, and ...
alluvial placers
Mining; Mining tools
Alluvial placers are those formed in river or stream sediments. Typical locations for alluvial gold placer deposits are on the inside bends of rivers and creeks; in natural ...
jig
Mining; Mining tools
A jig is a type of tool used to control the location and/or motion of another tool. A jig's primary purpose is to provide repeatability, accuracy, and interchangeability in the ...
drill jig
Mining; Mining tools
A drill jig is a type of jig that expedites repetitive hole center location on multiple interchangeable parts by acting as a template to guide the twist drill or other boring ...
jig borer
Mining; Mining tools
The jig borer is a type of machine tool invented at the end of World War I to make possible the quick-yet-very-precise location of hole centers. It was invented independently in ...
mining
Mining; Mining tools
Extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest ...
Sub-categories
- Coal mining (40)
- Diamond mining (39)
- General mining (41978)
- Gold mining (103)
- Mineral mining (36958)
- Minerals (696)
- Mining tools (94)
- Space mining (40)