key componentsfinite-element analysisoptimization designAiming at the problem of the fracture and damage of key parts of covering-soil machine for grape vines,on the basis of structure design and test study of the existing small covering-soil machine for grape vines,its key components were analyzed...
components ofterrestrial ecosystems. The rapid industrial development and indiscriminate exploitation of syntheticchemicals including herbicides, pesticides, weedicides, and insecticides have drastically and negatively affected the soil attributes, particularly the soil biological processes (Trasar-Cepeda et al.,...
In conclusion, grasshoppers are essential components of their ecosystem, but they may also cause problems when their numbers become too high. Their habitat and environment influence their distribution and the roles they play in the larger ecosystem. Predators and Natural Enemies Birds and Lizards Birds...
The different components of a data publishing system need to work, to the greatest extent possible, in a seamless and integrated way. We therefore advocate the implementation of existing standards for repositories and all parts of the data publishing process, and the development of new standards ...
An Abbreviated Key to Soil Orders SOILS WITH-- 1. A. permafrost at <1 m; OR B. gelic materials at <1m and permafrost at <2m GELISOLS 2. organic materials that are— A. 2/3 of thickness over lithic/paralithic contact, with no mineral horizons >10 cm; OR B. saturated >30 days/...
Since the establishment of the institute, more than 50 companies have completed experimental verification and testing of more than 120 types of agricultural machinery equipment and components on 10,000 mu of test fields in the demonstration zone....
to become reduced to components, fragments, or particles 分解,分裂,碎裂:disintegrate the 2 / 140 圣才电子书 十万种考研考证电子书、题库视频学习平台 www.100xuexi.com enemy troops 瓦解敌军 20. blast [ ] n. a sudden strong movement of wind or air 强风,阵风:A blast of hot air came...
In this study, headspace solid phase microextraction gas chromatography mass spectrometry (HS-SPME-GC-MS) was used to identify the volatile substances of four Wuyi rock teas varieties, and the key aroma components were screened by principal component analysis (PCA) and aroma activity value (OAV)....
Ehlers W (1997) Optimizing the components of the soil water balance by reduced and no-tillage. In: Experience with the application of no-tillage crop production in the West-European countries. Proceedings of the EC-Workshop HI, Evora, Portugal. Wissenschaftlicher Fachverlag Dr. Fleck, Giessen,...
aNOTE: Manufacturers may agree with the certifying body whether or not the mark will be applied to individual components in a fitting that passes the required tests. 注: 制造者也许同意证明的身体是否标记在通过必需的测试的配件将被运用于各自的组分。 [translate] atransfer of property and risk 物产...