The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 179
... usually be re- quired in later stages of production . Gas wells that pro- duce little or no liquid do not need artificial lift devices . Surface equipment . Water often flows into the well along with oil and gas . Surface equipment ...
... usually be re- quired in later stages of production . Gas wells that pro- duce little or no liquid do not need artificial lift devices . Surface equipment . Water often flows into the well along with oil and gas . Surface equipment ...
Page 197
... usually three to seven days , with occasional shaking . The product is then filtered , the residue on the filter ( known as the marc ) is pressed to avoid loss , and the mixed filtrates are clarified , either by subsidence ( settling ...
... usually three to seven days , with occasional shaking . The product is then filtered , the residue on the filter ( known as the marc ) is pressed to avoid loss , and the mixed filtrates are clarified , either by subsidence ( settling ...
Page 520
... usually are used both for barrel and screw , the latter being bored for heating or cooling . Direct cur- rent motor drives are preferred for accuracy of control ; the heating or cooling zones on the barrel , which may be built in , are ...
... usually are used both for barrel and screw , the latter being bored for heating or cooling . Direct cur- rent motor drives are preferred for accuracy of control ; the heating or cooling zones on the barrel , which may be built in , are ...
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activity America animals appear areas atoms became become body called camera century changes characteristics chemical Church colour common complete compounds consists containing continued drugs early effect electrons elements energy example existence experience Family field Figure fins fishes groups human important increase individual industry Italy known later lens less light liquid living lower major material means ment methods move movement natural North object occur organic original Peking Pentecostal percent period permafrost personality pest Peter petroleum Philip philosophy photographs plants political position possible practice present printing problems production Quakers range region result rocks similar social South species structure surface temperature theory tion United usually widely