Automobile Engineering in ME
Vulcanizing means

None of the listed here
Spraying with special paint
Heating rubber under pressure
Melting rubber while stirring it

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Automobile Engineering in ME
The crankcase dilution means

Dilution of oil by water in the crankcase
Dilution of mixture passing through crankcase in two stroke engines
Dilution of lubrication oil by fuel in the crankcase D. Dilution
Dilution of fuel in the crankcase

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