查询词典 nitric acid

Settlers bought the goods they needed from salesmen or peddlers who traveled in Wagons. People often paid for the goods with pieces of gold jewelry. To test the true value of a piece of gold, a peddler would make a small scratch on it and put a drop of nitric acid on the scratch.

拓荒者从坐马车的小贩手中买东西，人们常常用金首饰付款，为了测定一块金子的真正价值，小贩常常在金子上划一道印，然后放一滴硝酸在这道印上。

The nitric acid production process optimization question modeling uses the artificial neural network to complete.

硝酸生产过程优化问题的建模采用人工神经网络完成。

Off-line steady optimization of nitric acid process unit is discussed in this thesis.

本文以某厂硝酸生产装置为优化对象进行了离线稳态参数优化工作的研究。

Effects of reaction temperature,reaction time and mole ratio of nitric acid to aromatic hydrocarbons on performance of the catalyst were investigated.

实验结果表明，磷钨酸对低沸点芳烃液相硝化反应具有显著的催化活性，在优化的条件下，苯、甲苯和氯苯的转化率分别为98.0%，99.5%，100.0%。

The influences of reactiontemperature, leaching time, dosage of nitric acid and the ratio of solid to liquid wereinvestigated.

在银的浸出实验中，通过单因素条件研究了反应温度、时间、硝酸用量和固液比对浸出率的影响，确定了浸出银的最佳工艺。

Nitric Acid, at least 50% but not more than 70

22硝酸，不少于20%，但不超过70

Electrodeposition of americium ( 241 Am and 243 Am) from the mixture of isopropyl alcohol and dilute nitric acid is studied by molecular plating procedure.

研究了异丙醇-硝酸介质中镅( 2 4 1，2 4 3Am)的分子镀过程和实验条件。

Contains the carcinogen, and contains the nitric acid amine, can cause of sick with long time eats..

7腌菜：腌菜若制作不得法，含致癌物，并含硝酸胺，久吃因而致病。

Contains the carcinogen, and contains the nitric acid amine, can cause of sickwith long time eats..

7腌菜：腌菜若制作不得法，含致癌物，并含硝酸胺，久吃因而致病。

Contains the carcinogen, and contains the nitric acid amine, can cause

7腌菜：腌菜若制作不得法，含致癌物，并含硝酸胺，久吃因而致病。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。