Rule 491. Cold-cathode gas discharge tubes designed to demonstrate the effects of a flow of electrons or the production of x-radiation are subject to the requirements of R 333.5492 to R 333.5495.
Mich. Admin. Code R. 333.5491
Rule 491. Cold-cathode gas discharge tubes designed to demonstrate the effects of a flow of electrons or the production of x-radiation are subject to the requirements of R 333.5492 to R 333.5495.
Mich. Admin. Code R. 333.5491