The PVC film is quicker than the PE film in senescence, however, in two months no senesce would happen.

 
  • PVC膜的老化較PE膜快,但覆蓋兩個(gè)月內不發(fā)生老化;
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan