共 50 条
- [31] CASE FOR ONE OR TWO UNIT COAL MINES. [J]. Proceedings of the Society of Photo-Optical Instrumentation Engineers, 1980,
- [33] Boys in the pits: Child labour in coal mines. [J]. MONTHLY LABOR REVIEW, 2001, 124 (03) : 77 - 78
- [34] UNDERGROUND RAILWAY CONVEYING IN BRITISH COAL MINES. [J]. Mining Technology, 1974, 56 (644): : 210 - 212
- [35] INTRINSICALLY SAFE LIGHTING SYSTEMS FOR COAL MINES. [J]. Vector (Electrical Engineering), 1984,
- [36] AUDIBLE WARNING SIGNALS IN UNDERGROUND COAL MINES. [J]. Transactions of the Society of Mining Engineers of AIME, 1975, 258 (01): : 1 - 7
- [37] Radiation exposures to miners in polish coal mines. [J]. HEALTH PHYSICS, 2003, 84 (06): : S174 - S174
- [39] GEOCHEMICAL INVESTIGATIONS FOR NEW UNDERGROUND COAL MINES. [J]. Coal miner Vancouver, 1981, 6 (05):
- [40] MINING OF THICK SEAMS IN CHINESE COAL MINES. [J]. Journal of Mines, Metals and Fuels, 1980, 27 (09): : 278 - 284