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. Author manuscript; available in PMC: 2018 Oct 10.
Published in final edited form as: J Environ Prot (Irvine, Calif). 2017 Apr;8(4):394–415. doi: 10.4236/jep.2017.84029

Figure 1.

Figure 1.

Example PCs encountered in this study: (a) WellMark 7400 IPC level and Kimray T12 temperature IPC, (b) Kimray back pressure regulator IPC, (C) WellMark 6900 level controller IPC, and (d) Fisherâ„¢ 4660 high-low pressure pilot CPC with side cover removed.