Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3770Chemical news office., 1932 |
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Strona 24
... surface . The weight of the pipe bears on the bit and multiplies the abrasive effect of it rotation . The rock is ground out ; and water or other fluid - passing downwards through the interior of the pipe and upwards around it , flushes ...
... surface . The weight of the pipe bears on the bit and multiplies the abrasive effect of it rotation . The rock is ground out ; and water or other fluid - passing downwards through the interior of the pipe and upwards around it , flushes ...
Strona 27
... surface conditions and an approximate method is described for use where exact mathematical solutions are not available . Every day experience teaches us that the rate at which a surface loses heat to the sur- rounding medium increases ...
... surface conditions and an approximate method is described for use where exact mathematical solutions are not available . Every day experience teaches us that the rate at which a surface loses heat to the sur- rounding medium increases ...
Strona 28
... surfaces and are well - known to be unreliable . It is pointed out that radiation , conduction and convection all enter into the transfer of heat across the air space between a hot surface and a parallel cooler surface . The heat ...
... surfaces and are well - known to be unreliable . It is pointed out that radiation , conduction and convection all enter into the transfer of heat across the air space between a hot surface and a parallel cooler surface . The heat ...
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activity adopted applied boring Buildings calculated carbon Communicated compared completed conduction considerably Controller convection cool countries define depth described determination direct discovery distribution drilling effect elastic emitted existence experience experimental explosion fact factor field flame flowing fuel furnace further gases given heat transfer important increased industry instance Institute for Medical interest issued June knowledge known laboratories late limited London lower Marks mass measured Medical Research medium ment method National Institute nature nights obtained Office operates original Patent path petroleum possible practical present pressure principles processes production proportion published quantities radiation recently recommended recorded reduced regions Research reservoir rock scientific shape simple solids square standard preparation station steam structural studied suitable surface temperature tion underground unit values vapour various vitamin waves workers