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效果 发表于 2025-3-21 21:49:48

n is an indication of how much this subject has developed in the last few decades. The Conference is intended to bring together as much information as possible in the field of Land Drainage together with forecasts of future developments in this important subject. The Proceedings will provide a unique referenc978-3-662-22016-0978-3-662-22014-6

失误 发表于 2025-3-22 00:56:43

Surface and Subsurface Drainage Projects Achieved in Stages,out 2.576 thousand ha..During the 1986–1990 five years plan the surface-drainage works will be extended all over the zones of the country affected by moisture excess so that the total reclaimed area will reach about 5 mil ha by the end of 1990..Due to the weak development inherited from the past in

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those concerned with the subject. It is hoped that engineers, economists, biologists, public servants, and others will gain a greater appreciation of the interrelationship of gross observations and biological events that occur at the cellular and molecular level. Lack of such understanding is, to a large exte978-1-4613-4391-2978-1-4613-4389-9

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Waldemar Mioduszewski,Zbigniew Kowalewskio (1964) on the basis of microbial growth on hydrocarbon substrates. Addition of a second CH. group into a saturated straight chain usually makes the molecule more recalcitrant to a variety of genera and species of organisms. That is, a quaternary carbon atom makes the compound more refractory to en

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查看完整版本: Titlebook: Hydraulic Design in Water Resources Engineering: Land Drainage; Proceedings of the 2 K. V. H. Smith,D. W. Rycroft Conference proceedings 19