Objective To explore the biological exposure indices ( BEI ) of dimethylformamide ( DMF ) in China.目的探讨我国二甲基甲酰胺 ( DMF ) 的生物接触限值 ( BEI ).Methods Reforming the Hodge method in synthetizing DMF.参照hodge法并作,改良合成1-脱氧-1-吗啉果糖(DM...
Methods Reforming the Hodge method in synthetizing DMF.参照hodge法并作,改良合成1-脱氧-1-吗啉果糖(DMF) 后做相关实验.In this thesis, the Henry coefficients of DMF, butanone and toluene in DBP were measured.论文测定了DMF 、 丁酮和甲苯在DBP中的亨利系数.Colour sta...
I heard them coming, crashing through the undergrowth, before I saw them.还没看到他们，我便听到他们穿过矮树丛过来的声音。He keeps coming to the aid of this damsel in distress.他不断出手相助这位落难女子。It might give the Commission undue influence over the c...
...the rosy brick buildings.红粉色砖砌大楼We tied this letter to a brick and threw it over the railing.我们把信系在砖上,然后抛过栏杆去。Scope of business: brick machine, sand machine, crusher, stove.经营范围: 砖机 、 砂机 、 破碎机 、 回风炉.He made a surrepti...