Black oxidising coatings are also available, which are ideally suited to rollers and rings for bearings in wind turbines and rail traction motor bearings.

 
  • 黑色氧化膜也可以,這是適合輥和軸承環(huán)的風(fēng)力渦輪機和鐵路牽引電機軸承。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan