首页>
外国专利>
process for simultaneous production of methylene bis (phenylisocyanat) and polymethylenpolyphenyl - isocyanate mixtures with varying proportions of methylene bis phenylisocyanat
process for simultaneous production of methylene bis (phenylisocyanat) and polymethylenpolyphenyl - isocyanate mixtures with varying proportions of methylene bis phenylisocyanat