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Titlebook: Kryptogamen; Blaualgen Algen Pilz Karl Esser Textbook 19761st edition Springer-Verlag Berlin · Heidelberg 1976 Algen.Armleuchteralgen.Bakte

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21#
發(fā)表于 2025-3-25 06:24:18 | 只看該作者
Roy A. Carr-Hill,Colin W. Pritchardicles. Compared to conventional automotive materials, magnesium alloys can reduce the weight of structural components and systems by more than 50%. Vehicle fuel economy improves by 6–8% for every 10% reduction in weight [1], thus the significant potential for weight savings makes magnesium alloys an
22#
發(fā)表于 2025-3-25 11:24:11 | 只看該作者
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發(fā)表于 2025-3-25 12:54:18 | 只看該作者
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發(fā)表于 2025-3-26 01:07:29 | 只看該作者
27#
發(fā)表于 2025-3-26 06:22:10 | 只看該作者
ers in the last century, but, just as with other fields of endeavour, it continues to advance in leaps and bounds, both in procedure and in philosophy. These changes are not only of interest to other taxonomists, but have far reaching implications for much of the rest of biology, and they have the p
28#
發(fā)表于 2025-3-26 08:50:26 | 只看該作者
H. E. Schaeferturning point after which contingent valuation gained recognition as a methodology for estimating Hicksian surplus for public goods (Randall, Ives, and Eastman 1974). Contingent valuation filled a substantial void by providing a way to estimate values when markets do not exist and revealed preference methods are not applicable.
29#
發(fā)表于 2025-3-26 14:44:52 | 只看該作者
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