Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 449
ores of 1| metre in soft ground. No. 15, large trepan for widening the above in soft ground.No. 16, kibble for receiving debris, proposed to be suspended in the shaft during the work of widen-ing. No. 17, vertical section of the moss-box as fitted to the tubing of shaft No. 2 of LHopital.A A,… … MINING. 431 compression. B, first section of the tubing, which carries an outer flange and forms the other wallof the moss-box. 8 S, sheet-iron segments, which press on the moss and prevent exclusive verticalcompression of the same. M, moss contained in the joint before compression. No. 18,…
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