Figure 1: Gas Cylinder Regulator

Source Credit: Figure 1 provided by MESA Specialty Gas & Equipment (http://www.mesagas.com). Used with permission.
Figure 2: Connected to Gas Cylinder

Source Credit: Figure 2 provided by the Safety Office of University of Waterloo. Used with permission.
Originally published at http://www.sciencecases.org/gas_cylinders/handout2.asp
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