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- Water contains hydrogen and oxygen. 水含有氢和氧。
- rosin hydrogenation 松香加氢
- Water is composed of hydrogen and oxygen. 水由氢和氧组成。
- Water is composed of the elements hydrogen and oxygen. 水是由氢元素和氧元素组成的。
- Gum rosin is distilled from pine gum. 本产品由松脂蒸馏制得。
- Research Survey on the Rosin of Pinus L. 天然松树脂的研究进展。
- Water may be resolved into hydrogen and oxygen. 水可以分解为氢和氧。
- The hydrogen is the known the lightest element. 氢是已知的最轻的元素。
- By choosing,NMM synthesis need strong alkaline ion exchange rosin as catalytic,hydrogen peroxide as oxidation. 通过研究得到,采用强碱性离子交换树脂为催化剂,以过氧化氢为氧化剂,合成NMMO。
- Hydrogen and oxygen combine/Hydrogen combines with oxygen to form water. 氢与氧化合成水。
- A molecule of water consists of two atoms of hydrogen and one atom of oxygen. 水分子含有两个氢原子和一个氧原子。
- Water can be dissolved into hydrogen and oxygen. 水能分解成氢和氧。
- Dry rosin is best in tropic and soft rosin in cold climate. 干的松香在热带最适用,而软的松香适用于寒冷的气候。
- Both hydrogen and oxygen are elements. 氢和氧都是化学元素。
- Hydrogen is a one-valence element. 氢是一价的元素。
- The world gum rosin production appeares to decline in recent years. 目前世界上脂松香生产在大多数国家出现下降趋势。
- Water is a compound of hydrogen and oxygen. 水是氢和氧的化合物。
- Very high activity rosin flux used for difficult to solder metals. 用以对难以焊接金属进行焊接的极高活性松香助焊剂。
- This metal acts on water to set hydrogen free. 这种金属作用于水,就释放了氢气。
- Specifications of Gum Rosin Glyceride and Hydrogenated Ros. 松香甘油酯和氢化松香甘油酯的技术指标。