The World Book Encyclopedia, Tom 4World Book, 1994 - 666 An encyclopedia designed especially to meet the needs of elementary, junior high, and senior high school students. |
Z wnętrza książki
Wyniki 1 - 3 z 51
Strona 720
... coal and about 90 percent of the lignite in the United States have a low sulfur content . On the other hand , about 50 per- cent of the nation's bituminous coal has a medium ... Coal mines can be divided into two main groups : 720 Coal.
... coal and about 90 percent of the lignite in the United States have a low sulfur content . On the other hand , about 50 per- cent of the nation's bituminous coal has a medium ... Coal mines can be divided into two main groups : 720 Coal.
Strona 726
... coal into batches of three sizes . ( 2 ) Each batch is piped into a separate washing device and mixed with water . The impurities in coal are heavier than pure coal . As a result , the first pieces of coal to settle to the bottom of ...
... coal into batches of three sizes . ( 2 ) Each batch is piped into a separate washing device and mixed with water . The impurities in coal are heavier than pure coal . As a result , the first pieces of coal to settle to the bottom of ...
Strona 733
Related articles in World Book include : Basic coal products Ammonia Coal tar Coke Black lung Child labor Damp Diamond Energy supply Hanna , Mark Heating ( Coal ) Hydrogenation Industrial Revolution Coke oven gas Gas ( fuel ) Other ...
Related articles in World Book include : Basic coal products Ammonia Coal tar Coke Black lung Child labor Damp Diamond Energy supply Hanna , Mark Heating ( Coal ) Hydrogenation Industrial Revolution Coke oven gas Gas ( fuel ) Other ...
Inne wydania - Wyświetl wszystko
Kluczowe wyrazy i wyrażenia
amendment American animals areas army Atlantic Ocean became began Bogotá British called Canada centimeters circulatory system citizens Civil Cleveland climate Clinton clothing coal Coast Guard Cold War colleges Colombia colonies colonists color Colorado Columbia Columbus communication Communist Confederate Congo River Congress Connecticut conservation Constitution copper corn Costa Rica cotton countries court developed early economic elected Europe example farmers farms federal fibers forces House important Indians industry Island John kilometers Lake land live machine major manufacturing ment meters miners mining Mountains National North Ocean organization Park Party person plants political President programs Related articles River Scientific classification Senate ships short tons soil South Soviet Union square kilometers tion trade troops United vote West Western workers WORLD BOOK WORLD BOOK illustration World War II York City