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Clay pipe dating is the act of dating clay tobacco pipes found at archaeological sites to specific time periods.. Pipe bowl found in Kent, southeast England.The circular hole through the tube is slightly off-centre and measures 3.36mm in diameter, and would suggest a rough date of c.1610 AD.
Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...
Crude versions of conically tapered ground glass joints have been made for quite a while, [1] particularly for stoppers for glass bottles and retorts. [2] Crude glass joints could still be made to seal well by grinding the two parts of a joint against each other using an abrasive grit, but this led to variations between joints and they would not seal well if mated to a different joint.
A reducer reduces the pipe size from a larger to a smaller bore (inner diameter). Alternatively, reducer may refer to any fitting which causes a change in pipe diameter. [15] This change may be intended to meet hydraulic flow requirements of the system or adapt to existing piping of a different size. The reduction length is usually equal to the ...
When prepared for use as a pipe, the natural nodules are first scraped to remove the red earthy matrix, then dried, again scraped and polished with wax. [7] The crudely shaped masses thus prepared are turned and carved , smoothed with glass-paper , heated in wax or stearine , and finally polished with bone ash , etc. [ 7 ]
Trump said he’s heard that the number of autism cases has dramatically increased from more than one in 100,000 about 30 years ago to “one in 100” now.
(Reuters) -U.S. President-elect Donald Trump's transition team is exploring ways to significantly reduce, merge, or even eliminate the top bank regulators in Washington, the Wall Street Journal ...
Zhuric Phelps and Pharrel Payne each scored 16 points Saturday to lead No. 17 Texas A&M past No. 11 Purdue 70-66 in the first of two games at the Indy Classic. The Aggies (9-2) have won five straight.
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