Polyether is an effective wetting agent, and it can be used in textile dyeing, photographic developing and electrobath.

 
  • 聚醚是有效的潤濕劑,可用于織物的染色、照相顯影和電鍍的酸性浴中。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan