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Asphalts and allied substances: their occurrence, modes of production, uses in the arts and methods of testing
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摘要
The Fifth Edition has been painstakingly revised and brought up-to-data, in respect to (1)techological developemtnts,(2)methods fo testing,(3)bibliography(embracing more than 1, 300 treatises), and(4)references(totalling more than 20, 000, including about 12, 000 U. S. and foreign patents).

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