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

Dai S. Choi

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Book holder

Supports – Easel; book – copy or music score holder – Folded blank
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Cooking apparatus

Electric heating – Heating devices – Combined with container – enclosure – or support for material...
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Method for controlling stress and increasing the strength of sup

Mining or in situ disintegration of hard material – Processes – Forming blocks
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Method for preventing fluid migration in coal seams

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Mine roof control

Hydraulic and earth engineering – Earth treatment or control
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Profile ID: LFUS-PAI-P-496875

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