Assertion: dredge | /r/HasProperty | manufactured for a variety of purposes
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text: Dredges are designed and manufactured for a variety of purposes which take them all over the world—from Russia to dredge a nickel mine, to Columbia to help a marine contractor, to Nigeria to keep the flood plains at bay, to the northern parts of Canada to dredge the tar sands and nationally to keep the Great Lakes clear for shipping and waterways clear for irrigation and recreation.