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60 (LX) — 1949-1950
Density, 45.
Detaching Hook, 237.
Diesel Locomotives, Gases from, 73.
Diffusion, 258, 271.
Disused Shaft, Location of Centre, 63.
Ditch, Capacity of, 168.
Divisional Inspectors Reports, 148, 267, 281, 292.
Drift Across Fault, 90.
Drift, Length of, 154.
Driving Headings in Coal, 106.
Dumpy Levelling, 226.
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