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Yoshizawa–Randlett system. The Yoshizawa–Randlett system is a diagramming system used to describe the folds of origami models. Many origami books begin with a description of basic origami techniques which are used to construct the models. There are also a number of standard bases which are commonly used as a first step in construction.
Taxonomy of fish. Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy. Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as ...
A rice-fish system is a polyculture practice that integrates rice agriculture with aquaculture, most commonly with freshwater fish. It is based on a mutually beneficial relationship between rice and fish in the same agroecosystem. The system was recognized by the FAO in 2002 as one of the first Globally Important Agricultural Heritage Systems .
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Diving plane. The port bow plane of the Soviet-era submarine B-39. Diving planes, also known as hydroplanes, are control surfaces found on a submarine which allow the vessel to pitch its bow and stern up or down to assist in the process of submerging or surfacing the boat, as well as controlling depth when submerged. [1]
Large freshwater fish include Chinook, chum, coho, pink and sockeye salmon, as well as other salmonids such as lake trout, cutthroat trout, Dolly Varden, Arctic grayling and rainbow trout. Other fish include eulachon, burbot, round whitefish, northern pike, Pacific lamprey, lake chub and a variety of sculpins.