| 1. | Technical specification for auxiliary fans used for mine
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| 2. | Methods to reducing noise produced by auxiliary fan in mine
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| 3. | Improvement of model fd contra - rotating auxiliary fan
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| 4. | Technical specification for contrarotating auxiliary fans
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| 5. | Using auxiliary fan to treat gas in upper corner
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| 6. | Test study of two - speed contra - rotating auxiliary fan
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| 7. | Development of auto - shifting device of auxiliary fan
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| 8. | Application of intelligent double - auxiliary fan special switch
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| 9. | Automatic rotate device of auxiliary fan
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| 10. | Design and application of auto - shifting device of auxiliary fan
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मोबाइल