sn 中文意思是什麼

sn 解釋
Sn =【化學】 stannum (=tin); sanitary.
  1. Research on the processing technology of ag - cu - in - sn solder

    釬料加工工藝的研究
  2. Research and development of sn - ag - sb lead - free based solders

    系列合金的研究與開發
  3. Technical requirements and inspection methods for pb - sn - cu alloy antifriction coating

    Pb ? sn ? cu三元合金減摩鍍層技術要求和檢驗方法
  4. Uses : cold welding of nonferrous metals such as cu al ag ni pt sn zn ta and some of their alloys

    產品用途:對銅、鋁、金、銀、鉑、錫。鉭鈮等有色金屬線材及他們部分合金線材的焊接。
  5. A detailed analysis of the electrical properties of ato thin films was carried out in order to investigate the sb / sn atomic ratio and substrate temperature ' s influence on the ato thin film. a convictive explanation brought forward to illustrate the changing of the electrical ; properties of the ato thin film in different conditions

    在溫度較低時( < 500 ) ,薄膜的方塊電阻隨成膜溫度的升高而降低;當基板溫度繼續升高,薄膜的方塊電阻隨基板溫度的升高而增大,這主要是因為玻璃基板中k ~ + 、 na ~ +離子向薄膜中的擴散。
  6. The study of heat and mechanics of cu - ti - sn - cr alloys

    鉻合金熱學及力學性能研究
  7. Banerjee sn, emori tg, culver dh, et al : secular trends in nosocomial primary blood stream infection in u. s, 1980 - 1989. am j med 1991 ; 3 : 86 - 9

    陳政惠,吳怡慧,陳姿伶等:南部某醫學中心外科加護病房院內原發性血流感染菌種之變遷。感控雜志2001 ; 11 : 37 - 47 。
  8. The effects of different current density on the alloying element content were discussed. based on the results, the optimal process condition was confirmed : pb ~ ( 2 + ) 80 - 90 g / l sn ~ ( 2 + ) 7 - 15 g / l ch _ 4so _ 3 ( dissociative ) 130 - 150 g / l composite additive 12 ml / l current density 2 - 6 a / dm ~ 2

    採用hull槽實驗方法確定了甲磺酸體系電沉積pb - sn合金鍍層的電流密度范圍,並探討了不同沉積電流密度下pb 、 sn合金含量的變化規律。
  9. The rapid solidification process of pb - sn eutectic alloy is investigated with acoustic levitation and the maximum undercooling of 38k has been achieved

    採用聲懸浮無容器處理技術研究了pb - sn共晶合金在深過冷條件下的凝固規律。
  10. The present thesis has carried out detailed investigation on the rapid solidification of undercooled bulk water and pb - sn binary eutectic alloy with acoustic levitation, and the various factors influencing the achievement of undercooling in sound field have been analyzed

    主要取得了以下幾方面的研究成果:研究了5 8mm的大體積水在聲懸浮無容器條件下的快速凝固行為。獲得了最大為24k的過冷度。
  11. They seemred 882153 to come in stages and then start aga sn prfjbc but felty deeper

    他們似乎是分階段進行,接著,又-再次開始,但感覺更深一步。
  12. The front view of sn class steam locomotive

    停在個舊車站的sn型蒸汽機車正面
  13. Starch nanoparticles ( sn ) have been prepared with w / o starch microemulsion as microreader and epichlorohydrin as cross - linking agent. the factors affecting the preparation of sn have been investigated via the characterization of tem. the results show that the size and size distribution of sn are mainly controlled by the interfacial strength of microreactor, and the interfacial strength of microreactor is chiefly influenced by w value ( the molar ratio of water / surfactant ) and concentration of starch

    利用所得到的w o型澱粉微乳液作為微型反應器,以環氧氯丙烷為交聯劑制備出澱粉納米粒,並藉助透射電鏡的表徵研究了各制備因素的影響,研究結果表明:澱粉納米粒的粒徑及粒度分佈主要受微型反應器的界面強度控制,而影響界面強度的因素主要是r值(即水與表面活性劑的摩爾比值)及澱粉液濃度。
  14. Sn with 255mm and bf1 with 212mm in height ) from xiniu cave, shennongjia to investigate a decadal - century scale climatic changes of east asian monsoon covering the most part of the last two millenary

    近2000年來氣候變化的研究,對于認識未來氣候變化有重要的意義。作者從神農架犀牛洞採到兩根分別長255mm ( no . sn )和212mm ( no . bfl )的石筍。
  15. Number plate of sn class steam locomotive number 23

    Sn型蒸汽機車的號碼板
  16. Number plate of sn class 23 steam locomotive

    Sn型蒸汽機車23號的號碼牌子
  17. Study on plastic deformation resistance of sn - pb - re solder

    釬料的塑性變形抗力研究
  18. Pubescence is found only in the sn population on the surface of veins

    Sn居群的葉脈表面有毛,其他居群沒有。
  19. Semantic nets ( sn ) has powerful capability of knowledge representation ( kr ), but there is no accepted formal description architecture of it38 - 39. this problem leads to different meanings of it and uncertainty of inference process

    語義網路有很強的表達知識的能力,但它沒有公認的形式化表示體系,存在歧義性和推理不確定性的問題。
  20. The low - melting - point sn - pb - bi alloy was used as simulacrum to investigate the distortion of meniscus

    結果表明:當電源輸入頻率增大時,結晶器內的磁感應強度減小。
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