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- Is a nitrogen atmosphere needed for hand soldering? 手工焊接需要使用氮氣嗎?
- Nitrogen Atmosphere in Bearing Steel Ball H, T. 氮基保護氣氛中軸承鋼球的熱處理
- Should a nitrogen atmosphere be used in the reflow process? 回流工藝中是否應使用氮氣?
- In the physical and chemical experiments often use the oxygen nitrogen hydrogen argon and other gases. 在物理化學(xué)實(shí)驗中，經(jīng)常要用到氧氣、氮氣、氫氣、氬氣等氣體。
- AlN crystals were grown by modified sandwich sublimation method in nitrogen atmosphere. 采用改進(jìn)的升華法在氮氣環(huán)境下制備氮化鋁單晶體。
- Temperature control means using thyristor surge phase shifter using nitrogen atmosphere furnace used to seal welding, excellent sealing properties. 控溫方式采用可控硅移相調壓,采用氮氣保護氣氛,爐體采用全密封焊接,密封性能優(yōu)良。
- Theautomatic nitrogen atmosphere pushed platestructurefromthe kilnlining, hydraulic transmission, pipeline system, temperature control system. 該全自動(dòng)氮氣保護氣氛推板窯的結構由爐體,液壓傳動(dòng)系統,管路系統,溫控系統組成。
- Using benzene as solvent,the reactions of several aromatic hydrocarbons with N-bromosuccin-imide at visible light and nitrogen atmosphere were examined. 在可見(jiàn)光照射，苯為溶劑，氮氣氣氛中考察了數種多環(huán)芳烴與N-溴代丁二酰亞胺的反應。
- Using benzene as solvent ,the reactions of several aromatic hydrocarbons with N-bromosuccinimide at visible light and nitrogen atmosphere were examined. 在可見(jiàn)光照射,苯為溶劑,氮氣氣氛中考察了數種多環(huán)芳烴與N-溴代丁二酰亞胺的反應。
- The preparation of aluminium nitride powder by means of direct nitridation under pressurized nitrogen atmosphere and carbothermal nitridation of alumina is studied. 對在加壓氮氣中金屬鋁粉的直接氮化和氧化鋁粉的碳熱還原氮化法制備氮化鋁粉末進(jìn)行了研究。
- Hydrogen bonding configurations, Si/N and Si dangling bond densities in PECVD Si3N4 films have been measured as the function of the processing conditions and annealing temperatures in nitrogen atmosphere with IR, RBS and ESR. 用紅外光譜、背散射能譜和電子自旋共振波譜研究了不同淀積條件下生長(cháng)的PECVD氮化硅膜中的氫鍵,Si/N比和硅懸掛鍵。
- The nitrogen atmosphere below magnetic stirring is to do poly reaction.After the reaction is over, methylbenzene is added, after filtrating, filter residue is washed by methyl alcohol repeatedly. 反應結束后，加入甲苯溶解后過(guò)濾，濾渣部分反復用甲醇洗滌，真空干燥得到殼聚糖-接枝-聚己內酯。
- L-dopa has been successfully intercalated into the host, Mg/Al-LDH, via twice successive ion-exchange processes from the nitrate form of hydrotalcite under nitrogen atmosphere and avoiding sunlight. 以手性藥物左旋多巴為客體，水滑石為主體，實(shí)現了左旋多巴的插層組裝。
- The anti-inflammatory drug fenbufen，diflunisal and ibuprofen have been intercalated into layered double hydroxides for the first time by co-precipitation under a nitrogen atmosphere. 本論文首次采用共沉淀法制備得到抗炎藥物---芬布芬、二氟尼柳和布洛芬插層水滑石。
- Water contains hydrogen and oxygen. 水含有氫和氧。
- Nitrogen forms about 78% of the earth's atmosphere. 氮約占地球大氣的百分之七十八。
- The Reflow Techniques with Nitrogen Atmosphere 采用氮氣氛保護的再流焊接技術(shù)
- Oxygen enters into many compound bodies. 氧是許多化合物的組成部分。
- The solder paste manufacture will normally do extensive testing such as spread and wetting of its particular solder paste in both air and nitrogen atmospheres. 焊錫膏制造商一般會(huì )進(jìn)行范圍廣泛的測試,如在空氣和氮氣中對焊錫膏的擴散和熔濕性進(jìn)行測試。
- The meeting is gone on in very friendly atmosphere. 會(huì )議在非常友好的氣氛中進(jìn)行。
