英语语法分析

Hexamethylene diisocyanate (HMDI) may be used in prepolymer, in place of TDI.

六亚甲基二异氰酸酯(HMDI)可用在预聚物中代替甲苯二异氰酸酯〔tdi〕。

The tendency of preparing adipic acid and hexamethylene diamine from non-benzene materials is also introduced.

此外，还介绍了以非苯原料制备己二酸、己二胺的开发情况和市场动向。

With the hexamethylene as solvent and naphthalene as solute, the relative error of molar mass of naphthalene measured is not much as 1%.

以环己烷作溶剂、萘为溶质测得萘摩尔质量的相对误差均在1%以内。