51. The operation of cutting a sheet of metal in a straight line along the length, is known as
52. The metal is subjected to mechanical working for
53. In die casting, machining allowance is
54. In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.
55. The property of sand due to which the sand grains stick together is called
56. In a four high rolling mill, there are four rolls out of which
57. A two high rolling mill consists of two rolls which rotate
58. In ________ welding, the weld may be made either from left to right or from right to left.
59. The surface to be left unmachined is marked on the pattern by
60. The surface to be machined is marked on the pattern by
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