pit-run gravel

【参加注册考试的感想】-土木在线论坛 ... pitching 纵摇 pit-run gravel 天然级配砾石 pitting 孔蚀；点蚀 ...

gravel ... piedmont gravels 【地质】山麓砾石 pit-run gravel 【地质】滩砾 pit-run clay gravel 坑粘土砾石 ...

http://www.ptsgi.com/chinese... ... "山岳隧道"," Mountain tunnel" "山砾石"," Pit-run gravel" "工地"," Work site" ...