海量資源,盡在掌握
 1.質(zhì)量標(biāo)準(zhǔn)表1-48蒽醌的質(zhì)量標(biāo)準(zhǔn)(GB2405-80)指標(biāo)名稱指標(biāo)一級二級含量(%)≥初熔點℃≥98.5283972802.性質(zhì)與用途表1-49蒽醌的性質(zhì)與用途 (共 82 字) [閱讀本文] >>