The New Book of KnowledgeGrolier, 1986 - Počet stran: 21 An illustrated encyclopedia containing over 9,000 articles on history, literature, art and music, geography, myths and legends, mathematics, science, hobbies, holidays and festivals, games, sports, crafts, medicine, law, government, industry, politics, and other topics. |
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Strana 103
... move forward to produce lift . A helicopter can stand still , while its rotor blades move through the air producing the lift required for flight . Thus the helicopter can move straight up or down or can hover over one spot . The amount ...
... move forward to produce lift . A helicopter can stand still , while its rotor blades move through the air producing the lift required for flight . Thus the helicopter can move straight up or down or can hover over one spot . The amount ...
Strana 146
... move . Cranes are also classified according to the greatest load they can move ; on this basis they vary in size from one ton to over 250 tons . Derrick . A derrick is a special type of crane in which the distance from the end of the ...
... move . Cranes are also classified according to the greatest load they can move ; on this basis they vary in size from one ton to over 250 tons . Derrick . A derrick is a special type of crane in which the distance from the end of the ...
Strana 147
... moving back and forth across the bridge , loads can be moved to any place within the building . Gantry Crane . Gantry cranes are also frame- works of girders that move overhead . They are used mostly outdoors in railroad yards and at ...
... moving back and forth across the bridge , loads can be moved to any place within the building . Gantry Crane . Gantry cranes are also frame- works of girders that move overhead . They are used mostly outdoors in railroad yards and at ...
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aardwolf Africa American ancient animals Asia became began birds blood body breed British building built called Celsius century church color deer elected emperor England English Europe French German Greek hair Haiti Haleakala handball Hanukkah Harrison Hawaii Hawaiian Hayes heart heating systems Hebrew helicopter helium Henry Hispanic holiday Holy Honduras honey Honolulu Hoover horses horseshoe crab hospital hostel houses Hungary hunting hurricane hydraulic hydrofoil hydrogen hyena hymns hypnosis important Indians islands Jews Kahoolawe Kauai kilograms kilometers king land liquid live mammals Maui meters migrate Molokai mountain move National Niihau North Oahu picture piston plants play poet popular president race Roman served songs South Spanish stories striped hyena temperature tion tornado United usually walls warm wild words World War II York young