deposition of lead 中文意思是什麼

deposition of lead 解釋
鉛沉積
  • deposition : n. 1. 免職，罷免；廢位。2. 淤積[沉積]（物，作用）。3. 耶穌從十字架上放下（的畫、雕刻）。4. 寄存，委託；委託物。5. 【法律】口供，證言；口供書。
  • of : OF ＝Old French 古法語。
  • lead : n 1 鉛，鉛製品。2 【航海】測鉛，測深錘，水砣。3 〈pl 〉（鋪屋頂的）鉛皮；鉛皮屋頂；【印刷】插鉛，...
  1. As an advanced materials preparation technology, spray - deposition has shown remarkable superiority in producing large - sized alloys and metal matrix composites. however, the spray deposeted preforms usually contain a certain quantity of porosity. besides, the oxide films on the surface of the particles lead to week metallurgic conjunction between the particles. in order to obtain an ideal structure and performance, the porous preforms need further densifying and plastical forming. in this paper, a new technology named wedge pressing was used to densify spray - deposeted 5a06 aluminium alloy, in which the large deformation can be obtained through the sum - up of local deformation and multi - step small deformation. this method can also solved the problems in traditional processing and greatly decreased the producing cost. what ’ s more, the reserch on the wedge pressing desification rules about the large - sized spray deposeted preforms was significant it was vital not only to the further densification of the prefoums but also to the further research on plastical deforming the research was also benefit to the industrialization an the application of the spray deposeted porous materials

    坩堝移動式噴射沉積技術作為一種先進的材料制備新技術，在制備大尺寸合金及金屬基復合材料方面具有顯著的優越性。然而噴射沉積坯件特別是大型坯件通常存在一定量的孔隙，顆粒表面存在一定量的氧化膜，顆粒之間未能完全達到良好的冶金結合狀態，因此需要進行后續緻密化和塑性變形才能獲得理想的組織和性能。本文採用一種新型的楔形壓制工藝，即通過局部變形、多道次小變形累積實現大變形的緻密化加工方法，對噴射沉積多孔坯料進行后續緻密化和塑性變形，很好地解決了傳統加工工藝的難題，大大降低了生產成本。
  2. Vugular pore openings are frequently as large as an ordinary lead pencil and are usually attributed to leaching of the rock subsequent to deposition

    空孔穴開孔通常與一支普通的鉛筆一樣粗，這是由於沉積后巖石的侵析作用造成的。
  3. Calcium pyrophosphage crystal deposition disease ( sometimes called " pseudogout " ) is not uncommon in persons over the age of 50, and can lead to acute, subacute, or chronic arthritis of knees, wrists, elbows, shoulders, and ankles

    焦磷酸鈣結晶沉積病（有時稱為「假性痛風」 ）在50歲以上人群中並不少見，它能引起膝關節、腕關節、肘關節、肩關節與踝關節的急性、亞急性或慢性關節炎。
  4. The synthesis process of single - wall carbon nanotubes ( swnts ) by catalytically chemical vapor deposition ( ccvd ) was investigated and the product was characterized with transmission electron microscopy ( tem ), electron diffraction ( ed ), electron dispersive spectra ( eds ) and raman scattering spectra etc. pyrolysis of methane over solid catalysts prepared with impregnation, ion - adsorption precipitation, and sol - gel technique can all lead to the growth of swnts

    本文研究了單壁納米碳管的化學氣相沉積法（ cvd ）制備工藝，並運用透射電子顯微鏡（ tem ） 、 x - ray能譜（ eds ）與喇曼（ raman ）光譜等分析手段，對產物及催化劑進行了表徵。採用浸漬法、吸附沉澱法與溶膠凝膠法等制備了催化劑，併合成了單壁納米碳管。
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