Based on the scalar scattering theory,a mathematical model of the light scattering intensity distribution of laser beam on the back focal plane of Fourier lens by a rough surface is established by means of the probabilistic-statistical method.

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A washer has a body having an axis and provided with a first bearing face surface located at one axial side and adapted to cooperate with a nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with an object, at least one third turning resistant surface adapted to cooperate with a thread of the bolt, the body having at least one resistive point arranged so that when the nut is turned and turns the bolt the body of the washer stops the bolt from turning and thereby the nut creates a pull on the bolt which elongates the bolt in an axial direction and applies to the body of the washer an axial force which overcomes the at least one resistive point so that a portion of the body of the washer is allowed to be pulled axially when the bolt elongates.

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The results show that the microscopical pore structure of the three dimensional orthogonal woven carbon fabric structure perform is composed of body-centered cubes which arranged periodically at spaces. The net structure and shape of the pores of perform are determined by the size and proration of the fasciculus diameter, which are key factors influencing the gaseous permeability and final density of composites. Once the proration of the fasciculus diameters of different directions is determined, the trend of diversification of the permeability followed by pore rate during CVI process and the density of composites are stated, and the permeability increases with the increase of the fasciculus diameter.

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The fibers are parallel to the top and bottom surfaces of the plate, and they are rotated counterclockwise around the plate normal through different angles.

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And the future of the bridge will be longer, bigger and more flexible direction, the bridge will also pay more attention to aesthetics and environmental protection. 50, New China has made rapid progress bridge the development of dual-use rail road towards a long-span bridges, re-loading, high-speed direction.

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An industrial sewing machine for the completion of a button hole comprises a needle holder that is connected via an arm to means which ensure a forward and backward motion perpendicular to the direction of the needle.

一種用于縫制鈕扣眼（1）的工業(yè)縫紉機(jī)包括一個(gè)通過一臂（21）與一裝置相連接的縫紉針夾持器（20）曰韩无码中文字幕毛片，該裝置確保縫紉針夾持器沿著垂直于縫紉針運(yùn)動(dòng)方向的方向往復(fù)運(yùn)動(dòng)h色视频网站在线观看。

If button-shaped surface caused negative fingers; The stick-shaped configuration caused palm negative; Texture increase friction dominated installed; texture implies that the direction of movement through the operation, increase human interaction and human exchanges, and its physical operation itself.

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The characters of directional blasting for demolishing the 120m chimney in Heshan Power Plant are that the toppling range is narrow （ a sector of +8 angle ）, the chimney's inner structure is not symmetrical in the toppling direction, the body's construction quality is relatively poor, and the engineering is very difficult with high risk.

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The measuring system comprises a coal transmission pipe, and the emitter and the receiver are arranged at two sides of the coal transmission pipe and positioned along the radial direction in a staggered way, thus leading the transmission direction of a microwave signal that is emitted by the emitter and the flowing direction of the pulverized coal in the coal transmission pipe to form an offset angle between 30 and 60 degrees.

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At the same time, a coal ship was sailing along the coast clockwise One of my clockwise.

與此同時(shí)，一艘煤船正以順時(shí)針方向順時(shí)針方向駛向海岸海岸午夜网站加勒比我污。