Sentence Examples

  • Drainage channels are provided, usually along the main haulage roads, by which the water flows to a sump excavated at the pump shaft.
  • All work simultaneously, each raising the water to a tank or sump above, whence it is taken by the next pump of the system, and finally discharged at the surface.
  • Where the water does not accumulate very rapidly it is a common practice to allow it to collect in a pit or sump below the working bottom of the shaft, and to draw it off in a water tub or" hoppet "by the main engine, when the latter is not employed in raising coal.

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