81. Urea autoclave is made of
82. For spinning viscose rayon, the extrusion spinnerettes are made of
83. Generally __________ are subjected to galvanising (i.e., zinc coating).
84. Which of the following will have the highest melting point?
85. Water gas generator is made of
86. Hammers and railway rails are normally made of
87. Post weld heat treatment is done by
88. When iron is rusted, it is
89. White cast iron is not
90. White metal is an alloy of
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