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000052735 099__ $$aI28.26 /6:119
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000052735 1001_ $$aChislaghi, Charles T.
000052735 24510 $$aField test of an automated temporary roof support (ATRS) on a low-coal, single fixed-head roof-bolting machine (squirmer) /$$cby Charles T. Chislaghi and Thomas E. Marshall.
000052735 260__ $$aPittsburgh, Pa. :$$bU.S. Dept. of the Interior, Bureau of Mines,$$c1982.
000052735 300__ $$a11 p. :$$bill. ;$$c28 cm.
000052735 4900_ $$aTechnical progress report ;$$v119
000052735 500__ $$a"Bureau of Mines Coal Mine Health and Safety Program."
000052735 500__ $$a"December 1982."
000052735 504__ $$aIncludes bibliographical references.
000052735 650_0 $$aMine roof bolting.
000052735 650_0 $$aCoal-mining machinery.
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