Mini rock drill has been produced based on patented technology for rock drill warm extrusion.

 
  • 采用釬頭殼體溫擠壓精密成形專(zhuān)利技術(shù)生產(chǎn)了小型鑿巖釬頭。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan