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2. Clayton Mark and Company - Wikipedia

   en.wikipedia.org/wiki/Clayton_Mark_and_Company

   Clayton Mark founded Clayton Mark and Company in 1900 in Evanston to manufacture wrought steel pipe and water well supplies. [2] Clayton Mark, along with his four sons Clarence Mark, Clayton Mark, Cyrus Mark, and Griffith Mark held various positions in the firm and made it a driver of Evanston's economy. [3]

3. Clayton Mark - Wikipedia

   en.wikipedia.org/wiki/Clayton_Mark

   Clayton Mark (June 30, 1858 – July 7, 1936), one of the pioneer makers of steel pipe in the United States, was an industrialist in the Chicago area who founded the Mark Manufacturing Company in 1888, a firm for the fabrication and sale of water-well supplies and Clayton Mark and Company in 1900.

4. Pressure tank - Wikipedia

   en.wikipedia.org/wiki/Pressure_tank

   Case 2 is a tank in use, with the air pressure at pressure P (gauge) and a water volume of V. Referring to the diagram on the right, a pressure tank is generally pressurized when empty with a "charging pressure" P c, which is usually about 2 psi below the turn-on pressure P lo (Case 1). The total volume of the tank is V t.

5. Youngstown Sheet and Tube - Wikipedia

   en.wikipedia.org/wiki/Youngstown_Sheet_and_Tube

   In 1923, Youngstown Sheet and Tube purchased the assets of the Brier Hill Steel Company (also located in Youngstown, at Brier Hill), as well as the facilities of the Steel and Tube Company of America in East Chicago and Indiana Harbor, Indiana, making it the fifth largest steel maker in the United States and the largest employer in the Mahoning ...

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