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2. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Many thread sizes have several possible tap drills, because they yield threads of varying thread depth between 50% and 100%. Usually thread depths of 60% to 75% are desired. People frequently use a chart such as this to determine the proper tap drill for a certain thread size or the proper tap for an existing hole.

3. Automatic faucet - Wikipedia

   en.wikipedia.org/wiki/Automatic_faucet

   An automatic faucet or tap (also hands-free faucet, touchless faucet, electronic faucet, motion-sensing faucet, sensor faucet, or infrared faucet) is a faucet equipped with a proximity sensor and mechanism that opens its valve to allow water to flow in response to the presence of a user's hands in close proximity. The faucet closes its valve ...

4. Air gap (plumbing) - Wikipedia

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

   This "air gap" is visible above the sink as a small cylindrical fixture mounted near the faucet. In the base cabinet under the sink, the drain hose from the dishwasher feeds the "top" of the air gap, and the "bottom" of the air gap is plumbed into the sink drain below the basket, or into a garbage disposal unit. When installed and maintained ...

5. Contactless payment - Wikipedia

   en.wikipedia.org/wiki/Contactless_payment

   EMV contactless symbol used on compatible payment terminals. EMV stands for "Europay, Mastercard, and Visa", the three companies that created the standard.Contactless payment systems are credit cards and debit cards, key fobs, smart cards, or other devices, including smartphones and other mobile devices, that use radio-frequency identification (RFID) or near-field communication (NFC) for ...

6. Category:1590 - Wikipedia

   en.wikipedia.org/wiki/Category:1590

   Pages in category "1590" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. ...

7. Adams Synchronological Chart or Map of History - Wikipedia

   en.wikipedia.org/wiki/Adams_Synchronological...

   The chart was popular enough to be reprinted through several editions, and has been updated to continue into the 21st century. [3] [4] [6] [8] Knock off copies were produced in America and England. One such copy was published by Irish geologist Edward Hull in 1890, which gave an incorrect attribution to him after he added a geologic strata to ...