Author Topic: 56 "4-in-1" engines by North Dakota State College  (Read 2113 times)

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ahowell

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56 "4-in-1" engines by North Dakota State College
« on: October 29, 2009, 09:28:03 PM »
56  "4-in-1" Vacuum Engines built by Students at North Dakota State College of Science in Wahpeton, North Dakota