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PART 74--COAL MINE DUST PERSONAL SAMPLER UNITS Section 74.1 Purpose. 74.2 Sampler unit. 74.3 Specifications of sampler unit. 74.4 Tests of coal mine dust personal sampler units. 74.5 Conduct of tests; demonstrations. 74.6 Applications. 74.7 Certificate of approval. 74.8 Approval labels. 74.9 Material required for record. 74.10 Changes after certification. 74.11 Withdrawal of certification. AUTHORITY: 30 U.S.C. 957 , 961 . SOURCE: 35 FR 4326, Mar. 11, 1970, unless otherwise noted. |
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