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2. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   The picometre (SI symbol: pm) is a unit of length in the metric system equal to 10 −12 metres (⁠ 1 / 1 000 000 000 000 ⁠ m = 0. 000 000 000 001 m). To help compare different orders of magnitude this section lists lengths between 10 −12 and 10 −11 m (1 pm and 10 pm). 1 pm – distance between atomic nuclei in a white dwarf [citation ...

3. Duodecimal - Wikipedia

   en.wikipedia.org/wiki/Duodecimal

   The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.

4. Imperial units - Wikipedia

   en.wikipedia.org/wiki/Imperial_units

   The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road). The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.

5. Standard drink - Wikipedia

   en.wikipedia.org/wiki/Standard_drink

   United States standard drinks of beer, malt liquor, wine, and spirits compared. Each contains about 14 grams or 17.7 ml of ethanol. A standard drink or (in the UK) unit of alcohol is a measure of alcohol consumption representing a fixed amount of pure alcohol.

6. SAE 316L stainless steel - Wikipedia

   en.wikipedia.org/wiki/SAE_316L_stainless_steel

   Crevice corrosion of 316 stainless steel from desalination.. SAE 316L grade stainless steel, sometimes referred to as A4 stainless steel or marine grade stainless steel, is the second most common austenitic stainless steel after 304/A2 stainless steel.

7. Equivalent carbon content - Wikipedia

   en.wikipedia.org/wiki/Equivalent_carbon_content

   The carbon equivalent is a measure of the tendency of the weld to form martensite on cooling and to suffer brittle fracture. When the carbon equivalent is between 0.40 and 0.60 weld preheat may be necessary. When the carbon equivalent is above 0.60, preheat is necessary, postheat may be necessary.