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In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.
About 1/8 wavelength long: (left) 200 MHz stub is 19 cm, (right) 300 MHz stub is 12.5 cm 10 kW FM broadcast transmitter from 1947 showing quarter-wave resonant stub plate tank circuit. In microwave and radio-frequency engineering, a stub or resonant stub is a length of transmission line or waveguide that is connected at one end only. The free ...
A stub-girder system (or stub girder system) is a model of steel frame structures consisting of beams and decking, originally developed in the early 1970s in part by Joseph Colaco of Ellisor Engineers Inc.. [1] [2] Short lengths of stub girders the same depth as the floor beams are welded to the tops of the main girders to provide a connection ...
A blowdown stack is an elevated vent or vertical stack that is used to vent the pressure of components of a chemical, refinery or other plant if there is a process problem or emergency. A blowdown stack can be used to complement a flare stack or as an alternative. The purpose is to prevent 'loss of containment' of volatile liquids and gases.
Portable chests have a handle on top for portability and a top lid that opens on hinges. Portable chests typically have 3-4 drawers. Most are made from metal, but some have a plastic shell with metal drawers in order to help lighten the piece. A toolbox can also refer to a large tool storage system, or tool chest combos, that includes multiple ...
Recombinant adeno-associated virus (rAAV) based genome engineering is a genome editing platform centered on the use of recombinant AAV vectors that enables insertion, deletion or substitution of DNA sequences into the genomes of live mammalian cells.