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Design and construction of apparatus for determining the velocity of sound in gases at high pressures and temperatures
The purpose of the present work ie to present results obtained from studies using a variable path type interferometer designed for generating sound waves above the audible limit in gases at high pressures and temperatures. ...
A drillability classification of geologic formations
This thesis has been written because of the need in the oil well drilling industry for a system by which different types of bits can be classified with respect to different types of geological formations. As background ...