Nasdaq-listed Joy Global of Milwaukee said earlier this year it was looking to acquire about 41% of Hong Kong-listed International Mining Machinery.

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Siwei is a subsidiary of ERA Mining Machinery, a Hong Kong-listed firm controlled by a shell company whose principals are two American entrepreneurs in China.

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In recent years, Indian companies have invested billions of dollars in the United States -- in American machinery, manufacturing, mining, research, technology.

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T-shirts, bathing suits and machinery for energy and mining.

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One such supplier is Titan International (nyse: TWI - news - people ) (38, TWI) , which makes huge tires for mining and agricultural machinery.

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