4. Sugarbeet and cane sugar refining, hydroelectric power, cinder block, coal
briquetting, gravel, grain milling, ready-mix concrete, sawmill, sewage and water
purification, wood preserving, and wood working are also primarily considered
mechanical industries.
a. Specific features which should help you quickly identify these industries are
listed in Figure 2-15.
Figure 2-15. Key Identification Features.
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