In order to research the effects of minimum tillage and no-tillage patterns on kernel quality of winter wheat, five tillage patterns were adopted in Longkou city, Shandong Province, for three years. The five tillage patterns were as follows: conventional tillage with no straw turnover, conventional tillage with straw turnover, rotary tillage with straw turnover, serrated disk harrow tillage with straw turnover, no-tillage with straw cover.

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With Gongboxia Hydropower Station on the Yellow River taken as an example,some related problems were discussed,including the key points on the shape optimization of horizontal and vertical rotary internal energy dissipator,t.

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The performance of soil Lateral throwing of the rotary-cultivated ditcher is a target for judging the working quality of a ditcher.

旋耕開溝機開溝作業(yè)的橫向拋土性能是衡量開溝機作業(yè)質量的重要指標。

Based on theoretic research, rotary-ditch machine is produced and orthogonal test is carried out in the farm. By variance and extreme deviation analysis on the test result, all the influence factors on ditcher casting performance are gained, superior level and optimum combination are found out, relation curve of performance target along with factor change is provided.

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Based on the analysis of the key components of disc ditcher, the maximum lift height of the rotary blade shaft and the minimum size of the elevating device as the objective functions were introduced to establish a nonlinear mathematical model satisfiable to multiple constraint conditions of mechanical structure and agronomic demands.

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Base facilities greatly augment, new build steel tube big canopy 200 mus, establishment of installation sprinkling irrigation 500 mus, added apply to the small-sized agricultural machinery and implement such as machine of the rotary tillage machine that plows inside vegetable big canopy, ditcher, mist, built the vegetable workshop that pack and detect room acquired pesticide incomplete

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Combining optimization design with CAD and automatizing completely the process of design have become a important development trend in design method field.A new-style ditcher for sluice and keeping soil humidity is a rotary, discontinuous ditcher. It mainly used in arid and semiarid area, dig pits to sluice in sloping field, meadow, fallow and wasteland.

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Of the other members of his team, Laufer went to France after the war and joined SNCASO, where he worked on the jet-propelled Djinn, and Stepan went to England, where he joined Fairey and also does work connected with jet-propelled rotary wings.

對他的團隊的其他成員，勞費爾前往法國在戰(zhàn)后加入SNCASO精品国产色哟哟在线观看，他在噴氣推進燈靈工作人人揉揉揉揉揉日日，并斯捷潘到英國，在那里他加入了費爾雷高清在线中文字幕一区，也沒有與工作有關的噴氣推進旋轉翼秋霞理论久久理论电影。

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Lining of tunnel kiln, rotary kiln and downdraft kiln.

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