The major import would be machinery
Bulgaria's major import is oil and methane gas. Its major trade partners are Germany and Romania.
Major import: weapons, ammunition, killing machines from the USA. Major export: Opium, morphine.
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Coal
Water
A major import of Iran is machinery. Machinery makes up almost 20 percent of their imports. Machinery tools and vehicles are also major imports.
Electronics (from Germany)
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The major import of Pakistan is Petroleum, Fats, Electronic accessories and automobiles.
Electronics from Japan is a major imported good for the USA.