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A hammer and a screwdriver currently have the same price. If the price of a hammer rises by 6% and the price of a screwdriver goes up by 4%, how much more will it cost to buy 1 hammer and 1 screwdriver?
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Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of __________ °C.
Spalling resistance of a refractory can not be increased by
Thermal spalling mainly occurs during __________ of furnaces.
With increase in the porosity, thermal spalling resistance of fireclay brick
Spalling of a refractory means its
Spalling tendency of refractories is reduced by increasing its
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