71. The process extensively used for making bolts and nuts is
72. In a marine flange coupling, the pitch circle diameter of bolts is taken as
73. A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
74. In a steam engine, the valve rod is connected to an eccentric rod by means of
75. An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
76. Cap screws are
77. All stresses produced in a belt are
78. The included angle for the British Association thread is
79. The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called
80. In nitrated parts, the origins of the fatigue cracks will occur at
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