The Encyclopedia Americana, Volume 7Grolier, 1988 - Encyclopedias and dictionaries |
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Page 138
Where roof support is required ( as is often the case in weak shale ) , the overhead rock may be held in place by timber props , rock bolts , or other means . Artificial support is limited where possible to permanent openings .
Where roof support is required ( as is often the case in weak shale ) , the overhead rock may be held in place by timber props , rock bolts , or other means . Artificial support is limited where possible to permanent openings .
Page 436
... ownership of the means changing relations of production caused by changes of production in technical conditions . ... the means of cordance with needs , the state would cease to be production - patricians in Rome , feudal lords in ...
... ownership of the means changing relations of production caused by changes of production in technical conditions . ... the means of cordance with needs , the state would cease to be production - patricians in Rome , feudal lords in ...
Page 484
0 0 0 1 1 1 1 1 o means alphabetical information is presented to the computer in a numerical code , such logical procedures as alphabetization are also a matter of arithmetic . Logic Elements . Computer circuits can be represented in ...
0 0 0 1 1 1 1 1 o means alphabetical information is presented to the computer in a numerical code , such logical procedures as alphabetization are also a matter of arithmetic . Logic Elements . Computer circuits can be represented in ...
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