Zinc basic coating, prepared with flake zinc powder, aluminum powder, chromic anhydride and some other organic compounds, possessed good combination force and corrosion resistance.
利用片状锌粉、铝粉、铬酐及其它有机物配制的锌基涂料具有良好的结合力和耐蚀性。
In basic condition E ring was converted into the cyclohexanedicarboxylic anhydride to form purpurin 18 derivatives by the air oxidation.
在碱性条件下，通过空气氧化将E环转变为环己二羧酸酐形成红紫素18甲酯衍生物；
Methanol is a basic organic chemical raw material, which can be used to synthesize dimethyl ether, formaldehyde, HAc and acetic anhydride, etc.
甲醇是基本有机化工原料，可进一步加工为二甲醚、甲醛、醋酸、醋酐等。
Methanol is a basic organic chemical raw material, which can be used to synthesize dimethyl ether, formaldehyde, HAc and acetic anhydride, etc.
甲醇是基本有机化工原料，可进一步加工为二甲醚、甲醛、醋酸、醋酐等。
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