71. The type of drill rod used for coal drilling . . . . . . . .
72. In king safety hook the movable plates called . . . . . . . .
73. Direct rope haulage can be installation needs . . . . . . . . roads.
74. The shear cuts from the coal face a slice thickness . . . . . . . . mm.
75. The main methods of transport systems are . . . . . . . .
76. Type of rope most suitable for balancing rope in koepe winding is . . . . . . . .
77. 'Tucking' the word used in . . . . . . . .
78. When the impeller revolves the water is carried round by the blades and thrown off from the impeller periphery at an increased radial . . . . . . . . and . . . . . . . .
79. Safety catch consists basically of short livers mounted in head gear at intervals that very from . . . . . . . .
80. To prevent the mine tubs falling out of the cage . . . . . . . . are provided on the floor which act against sides of the mine car.
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