4. Hydraulic and earth engineering
  5. Earth treatment or control

Woody Yang

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Hydraulic pressure-actuated irrigation water distribution valve

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent

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Hydraulic timer mechanism for water irrigation

Hydraulic and earth engineering – Drainage or irrigation – Control means responsive to sensed condition
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Soil-holding net

Hydraulic and earth engineering – Earth treatment or control
Patent

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Profile ID: LFUS-PAI-P-988960

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