Selections from China Mainland Magazines, Supplement, 第 40-50 期 |
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第 1 到 3 筆結果,共 14 筆
第 40 頁
... bridges of various sizes . These bridges are different from our country's traditional stone arch bridges . They are double - curve arch bridges of a new type . This type of bridge was successfully invented in 1964 by the bridge ...
... bridges of various sizes . These bridges are different from our country's traditional stone arch bridges . They are double - curve arch bridges of a new type . This type of bridge was successfully invented in 1964 by the bridge ...
第 14 頁
... Bridge is over 1,570 meters above the river . The bridge has four tracks for trucks and two tracks for trains , with footpaths on both sides of the span each measuring over two meters in width . It there- fore serves as a major ...
... Bridge is over 1,570 meters above the river . The bridge has four tracks for trucks and two tracks for trains , with footpaths on both sides of the span each measuring over two meters in width . It there- fore serves as a major ...
第 15 頁
... bridge is an arrangement of beams fastened together in such 8 way that each beam shares part of the thrust or weight of the bridge . The beams can be either above or below the roadway of the bridge . On many bridges , the truss is the ...
... bridge is an arrangement of beams fastened together in such 8 way that each beam shares part of the thrust or weight of the bridge . The beams can be either above or below the roadway of the bridge . On many bridges , the truss is the ...
內容
Do Things in Accordance with Objective Laws | 6 |
The Petrochemical Industry | 13 |
Petroleum and Plastics | 19 |
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