An electron microscope shall be labeled with a readily discernable sign bearing the words, Caution RadiationThis Equipment Produces Radiation When Energized, or words containing a similar warning.
The provisions of this § 227.31 adopted February 1, 1972, effective February 2, 1972, 2 Pa.B. 212; amended December 18, 1987, effective December 19, 1987, 17 Pa.B. 5235. Immediately preceding text appears at serial page (4937).
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