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53 (LIII) — 1942-1943Recruitment for Mining Industry, 52. Reopening District, 251. Repairing Roadways, 69. Report on Colliery, 62, 71. Report, S.M.R.B., 181, 194, 208, 222. Research Programme, Proposed, 284. Resistance of Conductors, 90. Resistances in Parallel, 91. Restricting Length Exposed Cable, 2. Results, Examinations, 63, 257. Rolling Friction, 6. Roof Breaks, 45. Roof Supports, 191, 213. Ropes, Construction, 190. Ropes, Deterioration, 45. |
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