United States or United Arab Emirates ? Vote for the TOP Country of the Week !
Chavatte considered this moss-box as more detrimental than useful, and not at all indispensable, and so substituted beton for it, as had previously been done by Mr. Bourg, director of the Bois-du-Luc coal mines. Details of dredge. Details of maneuvering lever. Mode of lengthening the axis of the dredge. Hooks for lifting the dredge bags. Arrangement of valves in the beton box.
At 450 feet the diameter was diminished by three inches. Then an advance of a foot was made, and the diameter reduced by one and a half inch. The reason for this reduction in the diameter and change in the mode of deepening was as follows: The Chaudron moss-box, when it chances to reach its seat intact, and can consequently operate well, undoubtedly makes a good wedging.
Word Of The Day