The fiber structure and quality of the ramie with different growth period were researched.

 
  • 在不同生長(cháng)期收割苧麻,然后分別對其纖維結構及品質(zhì)進(jìn)行了研究。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan