Model 4U harvest of yams are suitable for potatoes\sweet potatoes\garlic and other root crops, it is composed of components such as cutting seeding organization\field wheel\girders\excavating a shovel, transporting chains, choosing sieve, they can integraly complete the working procedures such as harvesting\excavating\choosing, the series include the middle drive transmission and the left-side drive transmission for different types of tractors.
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