问:哪里下载ISO 12979 1999 Carbonaceous materials for use in the production of aluminium — Pitch for electrodes — Determination of C H ratio in the quinoline-insoluble fraction答:请联系微信:siduwenku
ISO 12979 1999 Carbonaceous materials for use in the production of aluminium — Pitch for electrodes — Determination of C H ratio in the quinoline-insoluble fraction