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42 (XLII) — 1931-1932
Valuation of Colliery Undertakings, 386.
Varies, Coal, 264.
Velocities, Measuring, 50.
Ventilating Sinking Shaft, 174.
Ventilation, 32, 34, 87, 97, 98, 106, 131, 150, 170, 191, 216, 238, 240, 242, 246, 262, 276, 310, 317, 333, 334.
Ventilation Calculations, 98, 291.
Ventilation Efficiency, 262.
Ventilation Instruments, 54.
Ventilation, Practical Aspect, 97.
Ventilators, Mechanical, 216.
Vernier, 367.
Vibratory Screens, 139.
Vocational Tests, 371.
Voltmeters, 58, 66.
Volume of Air Measurement, 54.
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