176. The ability of a material to offer resistance to scratching or indentation is a measure of its
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177. Cast iron has
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178. Hardest materials so far found is
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179. Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of
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180. Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of
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181. Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
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182. Nitriding of steel is a process for
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