The number of impellers on the pump shaft does not exceed . . . . . . . . in order to prevent bending and reducing the length.
A. 6
B. 8
C. 12
D. 10
Answer: Option D
This Question Belongs to Mining Engineering >> Mining Machinery
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Coal cutting machine ropes are . . . . . . . . wire rope core.
A. Fibre
B. Steel strand core
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D. All
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A. Rope stitching
B. Rope splicing
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