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A nest box, also spelled nestbox, is a man-made enclosure provided for animals to nest in. Nest boxes are most frequently utilized for birds, in which case they are also called birdhouses or a birdbox/bird box, but some mammals such as bats may also use them. Placing nestboxes or roosting boxes may also be used to help maintain populations of ...
Internal or external pressure induces stresses in the axial as well as circumferential (Cylinder stress Hoop Stress) directions. The pressure also induces stresses in the radial direction, but these are often neglected. The internal pressure exerts an axial force equal to pressure times the internal cross section of the pipe. F =P[πd^2/4].
Underground piping systems for landscaping drainage or the disposal of stormwater or groundwater also use low-pressure gravity flow, so fittings for these systems resemble larger-scale DWV fittings. With high peak-flow volumes, the design and construction of these systems may resemble those of storm sewers .
A push-in compression coupling and tee.. Push-to-pull, push-to-connect, push-in, push-fit, or instant fittings are a type of easily removed compression fitting or quick connect fitting that allows an air (or water) line to be attached, nominally without the use of tools (a tool is still usually required for cutting tubing to length and removal).
The nest of the long-tailed tit, Aegithalos caudatus, is constructed from four materials – lichen, feathers, spider egg cocoons and moss, over 6000 pieces in all for a typical nest. The nest is a flexible sac with a small, round entrance on top, suspended low in a gorse or bramble bush. The structural stability of the nest is provided by a ...
Senate Majority Leader Chuck Schumer is hoping to employ new technology to monitor the sharp uptick in drones.
1D nesting - for cutting optimization of one-dimensional parts such as bars, trusses, wires, pipes, rails; 2D nesting - for cutting optimization of flat parts such as sheet metal, cloth, glass, paper, leather nesting of rectangular shapes vs. nesting of multiple freeform 2D shapes (optionally with holes/isles)
A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...