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2. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   A typical nominal regulated gauge pressure from a medical oxygen regulator is 3.4 bars (50 psi), for an absolute pressure of approximately 4.4 bar and a pressure ratio of about 4.4 without back pressure, so they will have choked flow in the metering orifices for a downstream (outlet) pressure of up to about 2.3 bar absolute.

3. Spotsylvania County, Virginia - Wikipedia

   en.wikipedia.org/wiki/Spotsylvania_County,_Virginia

   Spotsylvania County is a county in the Commonwealth of Virginia.It is a suburb approximately 60 miles (90km) south of D.C. It is a part of the Northern Virginia region and the D.C. area.

4. Area codes 740 and 220 - Wikipedia

   en.wikipedia.org/wiki/Area_codes_740_and_220

   Area code 740 was established by an area code split of area code 614 on November 8, 1997. [1] By the end of 2013, exhaust studies indicated that the 740 area code would run out of telephone numbers sometime in 2015. The Public Utilities Commission of Ohio chose a relief plan by implementing an overlay with new area code 220, effective April 22 ...

5. Eagle Furnace, Virginia - Wikipedia

   en.wikipedia.org/wiki/Eagle_Furnace,_Virginia

   ZIP code: 24322. GNIS feature ID: 1492894 [1] Eagle Furnace is an unincorporated community in Wythe County, Virginia, United States. References This page was ...

6. Fredericksburg, Virginia - Wikipedia

   en.wikipedia.org/wiki/Fredericksburg,_Virginia

   Fredericksburg is an independent city in Virginia, United States.As of the 2020 census, the population was 27,982. [4] It is 48 miles (77 km) south of Washington, D.C., and 53 miles (85 km) north of Richmond.

7. Tubal Furnace Archeological Site - Wikipedia

   en.wikipedia.org/wiki/Tubal_Furnace...

   The Tubal Furnace Archeological Site is the site of an early 18th century industrial iron works in Spotsylvania County, Virginia, near Chancellor. Established by colonial Lieutenant Governor Alexander Spotswood in c. 1717, the site included a furnace and waterworks. It was operated, primarily by skilled slave labor, into the early 19th century.