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Polychaeta

The Polychaeta are a class of annelid worms, generally water-dwelling, with fleshy protrusions on either side of each body segment.

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Dynabee

... also be accelerated to a smaller extent by the slipping friction. The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US ...