this was a necessary line of defense against possible future aggressions from the west.
iron curtain
Great Wall
containment line
blitzkrieg
American intent
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thank for free point
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In early production, first calcium cyanamide was converted into dicyandiamide, which was heated above its melting temperature to produce melamine. Today most industrial manufacturers use urea in the following reaction to produce melamine: 6 (NH2)2CO → C3H6N6 + 6 NH3 + 3 CO.
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