以混凝土筑砌衬层 concrete-lined

衬砌 [矿业] [建] lining ; liner ; tunnel lining

隧道衬砌 lining of tunnel ; tunnel-liner

钢板衬砌 Steel Lining ; steel plate liner

隧道衬砌机 tunnel liner ; tunnel lining machine

水泥衬砌 cement lining

衬砌砖 back up lining brick

混凝土衬砌 [建] [矿业] concrete lining ; concrete liner