4. Hydraulic and earth engineering
  5. Drainage or irrigation
  6. Porous or apertured pipe, flume, or tileway

Ming-Chun Hu

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Drainage and strap drain materials

Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
Reexamination Certificate

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Drainage method and strap draining materials therefor

Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
Patent

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Self-powered rotary optical aligning apparatus

Geometrical instruments – Gauge – Collocating
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1245192

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