5. Examine the industry outdoor equipment key for extraction industries (Figure 2-3). Note the
typical extraction industrial equipment which can be observed outdoors, including conveyors,
derricks, power shovels, bulldozers, mine cars, and so on.
Figure 2-3. Industry Outdoor Equipment Key.
6. The bulk and waste materials identification key (Figure 2-4) will assist you in the identification
of bulk materials and waste by comparing the tone of the photo. This key is especially helpful in
determining the end products of extraction industries.
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