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2. Edward Samuel Ritchie - Wikipedia

   en.wikipedia.org/wiki/Edward_Samuel_Ritchie

   In Ritchie's third patent application (#38,126) dated April 7, 1863, several features that contributed to the success of his compass are revealed, including a floating card of nearly the same specific gravity as the liquid, an air-tight metallic case, and an elastic chamber that served as a diaphragm, compensating for temperature changes and ...

3. Liquidmetal - Wikipedia

   en.wikipedia.org/wiki/Liquidmetal

   [4] The lack of grain boundaries in a metallic glass eliminates grain-boundary corrosion—a common problem in high-strength alloys produced by precipitation hardening and sensitized stainless steels. Liquidmetal alloys are therefore generally more corrosion resistant, both due to the mechanical structure as well as the elements used in its alloy.

4. Electrical conduit - Wikipedia

   en.wikipedia.org/wiki/Electrical_conduit

   It only comes in 1/2" & 3/4" trade sizes, whereas FMC is sized 1/2" ~ 4" trade sizes. NEC 360.2 describes it as: "A raceway that is circular in cross section, flexible, metallic and liquidtight without a nonmetallic jacket." Liquidtight flexible nonmetallic conduit (LFNC) refers to several types of flame-resistant non-metallic tubing. Interior ...

5. Liquid Metal - Wikipedia

   en.wikipedia.org/wiki/Liquid_Metal

   Liquid Metal may refer to: A liquid metal, which has a relatively low melting point, such as mercury, tin or lead; Any metal in a liquid state; Mercury, the only metal to be liquid at room temperature; Liquid metallic hydrogen; Liquidmetal, a type of metallic glass; Liquid Metal (Sirius XM), a radio channel

6. Flatness (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Flatness_(manufacturing)

   In the manufacture of precision parts and assemblies, especially where parts will be required to be connected across a surface area in an air-tight or liquid-tight manner, flatness is a critical quality of the manufactured surfaces.

7. Metal hose - Wikipedia

   en.wikipedia.org/wiki/Metal_hose

   The result was a permanently flexible, leak-tight steel body of any length and diameter with a high mechanical strength. In France it was patented on 4 August 1885 with the patent number 170 479, and in Germany on 27 August 1885 with the German Reichspatent No. 34 871.