initinator)及下游元件(downstream element). TATA盒为转录调控因子包括各种调节蛋白的结合区，与转录起始位点的精确选择及转录有关，.
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罩盖(50)形成并放置在位于介质轮的下游的被部分包卷的滤嘴元件上面，由此完全地包卷滤嘴元件。
A cover cap (50) is formed and placed over the partially wrapped filter components downstream of the media wheel to thereby completely wrap the filter components.
将啮合块上、下游加入螺纹元件一同参与计算，可适当的解决出、入口边界条件失真的问题。
When simulating an individual kneading block, simplified entry and exit boundary conditions caused deviations between the simulation and the actual extrusion at some extent.
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