More Chinese companies participated in the World Pork Expo held last week in Des Moines in the U.S. state of Iowa, Expo exhibitor Jim Long was quoted by a local report as saying.
With China being one of world's largest pork markets, a lot of international visitors from China also came to the expo, Long said.
Many products at the expo were claimed to be labor-saving, or innovative to prevent disease outbreaks, he said.
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