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2. Trap (plumbing) - Wikipedia

   en.wikipedia.org/wiki/Trap_(plumbing)

   An S-shaped trap is also known as an S-bend. It was invented by Alexander Cumming in 1775 but became known as the U-bend following the introduction of the U-shaped trap by Thomas Crapper in 1880. The U-bend could not jam, so, unlike the S-bend, it did not need an overflow. In the United States, traps are commonly referred to as P-traps.

3. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   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.

4. Trap and trace device - Wikipedia

   en.wikipedia.org/wiki/Trap_and_trace_device

   Title 18 of the United States Code defines a trap and trace device as follows: . The term "trap and trace device" means a device or process which captures the incoming electronic or other impulses which identify the originating number or other dialing, routing, addressing, and signaling information reasonably likely to identify the source of a wire or electronic communication, provided ...

5. Carrier generation and recombination - Wikipedia

   en.wikipedia.org/wiki/Carrier_generation_and...

   If the difference between trap and band is smaller than the thermal energy k B T it is often said that it is a shallow trap. Alternatively, if the difference is larger than the thermal energy, it is called a deep trap. This difference is useful because shallow traps can be emptied more easily and thus are often not as detrimental to the ...

6. Pen register - Wikipedia

   en.wikipedia.org/wiki/Pen_register

   A pen register is similar to a trap and trace device. A trap and trace device would show what numbers had called a specific telephone, i.e., all incoming phone numbers. A pen register rather would show what numbers a phone had called, i.e. all outgoing phone numbers. The two terms are often used in concert, especially in the context of Internet ...

7. How to Tell the Difference Between a Value Stock and a Value Trap

   www.aol.com/news/2011-07-11-how-to-tell-the...

   A high-growth, rapid innovator like Apple (AAPL) is hardly the sort of stock you'd expect to find in a value investor's portfolio. Nevertheless, value investing guru Bill Nygren runs a mutual fund ...