How does iron and steel exhibit allotropy?

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Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?

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Explain a silver and deming drill brit?

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State some precautions to be taken in case of powder metallurgy?

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what other events in history might have affected the growth of metallurgy?

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What is the use od d2?

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What is the use of worm gears?

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What is recrystallization?

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Explain the purpose of riser?

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Is there a possibility of inducing stress cracking in an insulated stainless road tanker vessel (20 tonne capacity) if the vessel is subject to rapid filling (10 tonne /hr) with liquid methane (-160 c) assuming the vessel is at ambient. If so, where could I obtain suggested cooling rates?

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WHAT IS THE ACTUAL DEFINATION OF PLANET?

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Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062

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