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- degumming by two steps 两步脱胶
- A technology of desoxybenzoin synthesis from phenylacetic acid by two steps had been researched in this article. 研究了苯乙酸的合成工艺,以苯乙酮为原料,在四醋酸铅的氧化作用下合成苯乙酸。
- Triethyleneglycol monomethacrylate (TREGMA) was synthesized by two steps and characterized using IR and 1H NMR. 采用两步合成路线合成了二缩三乙二醇单甲基丙烯酸酯(TREGMA),并对其结构进行了表征;
- The 2,4,6-tribromophenyl acrylate was prepared from acrylic acid, thionyl chloride and tribromophenol by two steps in suitable condition. 以丙烯酸、氯化亚砜、2,4,6-三溴苯酚为基本原料,选择适宜的工艺条件通过两步法合成了2,4,6-三溴丙烯酸苯酯。
- The blackwater has been treated by two steps and the eliminatin efficiency of CODcr is more than 90%.It is superior to other flocculants obviously. 蒸煮黑液经二级处理，COD去除率达90%25以上，明显优于其它絮凝剂。
- The dimethyl diallyl ammonium chloride(DMDAAC) was synthesized by two steps based on selected optimum experimental conditions. 采用实验室最佳实验方案,利用二步法合成了二烯丙基二甲基氯化铵。
- The technics of distilling silver from waste electronic device by two step electrolysis method was studied. 研究了两步电解法回收废电子元器件中银的工艺条件。
- Bis(1-pyrazolyl)pyridazine was synthesized with pyrazole,3,6-dichloropyridazine, and sodium by two step,under water-free and oxygen-free conditions. 以吡唑、3,6-二氯哒嗪、金属钠为原料,在无水、无氧的条件下经两步合成了3,6-二(1-吡唑基)哒嗪,收率93%25。
- The business is owned by two partners. 这家商行为两名合伙人所拥有。
- Using tendo-tetrahydrodicyclopentadiene as raw material and AlCl_3-trace water system as catalyst,adamantane was synthesized by two steps. 以A lC l3微量水的催化体系研究了桥式四氢双环戊二烯通过两步法反应合成金刚烷。
- The results were shown below: 1.The PUA with low viscosity was synthesized with TDI, PEG400 and HEMA (molecular ratio was 5:1:8) by two steps. 研究结果表明： 1、合成低黏度的聚氨酯丙烯酸酯 (PUA) 的条件为：反应物TDI、PEG400与HEMA的物质的量比应为5:1:8；
- Black oxidation film on aluminum alloy with good adhension, strong corrosion resistance and beautiful color can be obtained by two steps of oxidation coloring. 该工艺通过两步氧化着色法,得到了结合力好、耐蚀性强、颜色鲜艳美观的铝合金黑色氧化膜。
- An intercalated kaolin/NR nano-composite was prepared by two step intercalation,and its structure and properties were investigated. 采用两步插层法制备高岭土/NR插层纳米复合材料,并对其结构和阻燃性能进行研究。
- He won the golf match by two shots. 他以两杆的成绩赢得了这场高尔夫球赛。
- The troop ship was escorted by two warships. 运兵船由两艘军舰护航。
- He was set upon by two masked men. 他受到两个蒙面人的袭击。
- This paper reports the IR spectroscopy of CPE synthetized by solid-phase chlorination process under different conditions. We also emphatically discussed the structural characterics of CPE, chlorineted by two steps. 本文研究在不同条件固相氯化聚乙烯(CPE)的红外光谱,探讨了一步和两步氯化合成的CPE的结构差别,着重讨论了两步氯化的CPE结构特点。
- The cart was drawn by two horses. 大车由两匹马拉著。
- He was my senior at Yale by two years. 他是耶鲁大学比我高两级的学生。
- He is junior to me by two years. 他比我小两岁。
