首页>
外国专利>
A process for the increase of the content of high molecular weight tar pitches of the resins in electrodes, the already the for electrodes pitches desired content of medium molecular mass tar resins from 18 to 22 have
A process for the increase of the content of high molecular weight tar pitches of the resins in electrodes, the already the for electrodes pitches desired content of medium molecular mass tar resins from 18 to 22 have
