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Contemporary cast nets have a radius which ranges from 4 to 12 feet (1.2 to 3.6 metres). Standard nets for recreational fishing have a four-foot hoop. Weights are usually distributed around the edge at about one pound per foot (1.5 kilograms per metre). Attached to the net is a handline, one end of which is held in the hand as the net is thrown ...
Cast net: Schooling and other small fish Cast nets (throw nets) are small round nets with weights on the edges which are thrown by the fisher. Sizes vary up to about four metres in diameter. The net is thrown by hand in such a manner that it spreads out on the water and sinks. Fish are caught as the net is hauled back in. [18] High ...
The half-angle (between the taper surface and the axis of the pipe) is arctan(1 ⁄ 32) ≈ 1.7899° ≈ 1° 47′. The standard for Nominal Pipe Size (often abbreviated NPS, which should not be confused with the abbreviation NPS for the straight thread form standard) is loosely related to the inside diameter of Schedule 40 series of sizes.
Tangle nets as adapted to the mark-selective fishery for spring Chinook salmon on the lower Columbia River have a standard mesh size of 4 + 1 ⁄ 4 inches (11 cm). Short net lengths and soak times are used in an effort to land fish in good condition.
While this allows the material to remain castable, the end product is much tougher than cast iron, and allows elastic behavior at lower stress levels. [1] Little cast iron pipe is currently manufactured, since ductile iron pipe is widely accepted as a superior product.
During the IPS period, pipes were cast in halves and welded together, and pipe sizes referred to the inside diameters. [1] The inside diameters under IPS were roughly the same as the more modern Ductile Iron Pipe Standard (DIPS) and Nominal Pipe Size (NPS) Standards, and some of the wall thicknesses were also retained with a different ...
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