Test apparatus for measuring sound power levels of drills

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086 0 ‡aI 28.27:9166
100 1 ‡aAljoe, William W.
245 1 0 ‡aTest apparatus for measuring sound power levels of drills / ‡cby William W. Aljoe, Robert R. Stein, and Roy C. Bartholomae.
260 ‡a[Pittsburgh, Pa.] : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c[1987]
300 ‡aii, 35 p. : ‡bill. ; ‡c28 cm.
490 0 ‡aInformation circular / United States Department of the Interior, Bureau of Mines ; ‡v9166
504 ‡aBibliography: p. 34-35.
538 ‡aMode of access: Internet.
650 0 ‡aRock-drills ‡xNoise.
700 1 ‡aBartholomae, R. C.
700 1 ‡aStein, Robert R.
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DAT 1 ‡a20221209060805.0 ‡b2024-02-23T18:55:31Z
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