61. Continuous miners are available in . . . . . . . . types.
62. In this system needs two-parallel tracks side by side, one for loads other for empties . . . . . . . .
63. The rate of penetration of the coal drill . . . . . . . .
64. In friction winding the pulley are . . . . . . . .
65. Deployment of machines at the working place from where mineral has to be extracted called . . . . . . . .
66. The detaching hook provide safety for the . . . . . . . . cage.
67. Cross section limits of road way for utilisation of continuous miner AM 50 . . . . . . . . height . . . . . . . . width.
68. The rate at which a machine component oscillates is called . . . . . . . .
69. The ratio of capacity to the product of the maximum length, width and height is called . . . . . . . .
70. The drill operated by . . . . . . . . and . . . . . . . . switch.
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