It is consider that the carbon slides impregnated with 40% paraffin wax kerosene liguid and with metal are optimum slides by test.

 
  • 通過(guò)試驗,認為以浸40%25的石蠟煤油液和浸金屬的碳滑板為最優(yōu)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan