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6860366 Oil passage structure in rotary shaft  
In an oil passage structure in a rotary shaft, including two systems of oil passages different in pressure that are provided extending from both ends of the shaft, the rotary shaft is provided with...
3686732 THE METHOD OF MAKING A POSITIVE CHOKE DEVICE  
Disclosed is a positive choke device having bore liner of silicon carbide. Also disclosed is a method of fabricating flow beans and the like having bore coatings of corrosion resistant materials...
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