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Every Type of Bridge Explained in 15 MinutesGrady Hillhouse of Practical Engineering explained the general style and design of every type of bridge over the course of 15 minutes. He looks at the different types of trestle bridges ...
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How Fish Ladders Work to Keep Certain Species Migrating SmoothlyGrady Hillhouse of Practical Engineering explained how fish ladders work to keep specific species migrating smoothly, ...
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