Core-Discharge Apparatus.
Description:
Patent for an Improvement in Core-Discharge Apparatus. It is meant to be used in connection with core drills in well or mine drilling. This improvement is meant to be carried to the surface by an air-lift pump.
Date:
October 1, 1918
Creator:
Carhichael, Robert E.
Item Type:
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Partner:
UNT Libraries Government Documents Department