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結果 : how to measure water flow in a ditch
1:49

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#wateryoudoing Canal Measurement

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Using the FP111 Global Water Flow Probe to measure flow rate in a channel

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Hydrological Station | Flow measurement | River stage gauge

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Calculating Slope Percentage

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Water Works: A Guide to Effective Water Measurement

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How to Measure Slope for French Drain [ Easy and Under $5 ]

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Irrigation Ditch Startup Flow

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How To Construct A Drainage Ditch? - Earth Science Answers

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Flow Rate before Application

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