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The black crappie (Pomoxis nigromaculatus) is a freshwater fish in the sunfish family (Centrarchidae). It is endemic to North America, one of the two types of crappies. It is very similar to the white crappie (P. annularis) in size, shape, and habits, except that it is darker, with a pattern of black spots. Alternate names for the species ...
Working from engineering drawings developed by the toolmaker, engineers or technologists, tool makers lay out the design on the raw material (usually metal), then cut it to size and shape using manually controlled machine tools (such as lathes, milling machines, grinding machines, and jig grinders), power tools (such as die grinders and rotary tools), and hand tools (such as files and honing ...
The component-making process involves building up a component on the fiberglass mold. The mold is a negative image of the component to be made, so the fiberglass will be applied inside the mold, rather than around it. As in the mold-making process, release agent is first applied to the mold. Colored gelcoat is then applied.