整体道床 meaning in Chinese

monolithic track bed solid bed integrated ballast bed monolithic concrete bed

Monolithic roadbed track maintenance in tunnel
隧道内整体道床线路的养护办法
Construction of monolithic track bed for urban elevated rail
城市高架轨道整体道床施工
The short - sleeper and long - lump monolithic roadbed construction technique
短轨枕长轨排整体道床施工技术
The practice of renewal of monolithic track bed with short sleeper in tunnel
隧道内短枕整体道床改造工程实践
Construction technology of elastic monolithic track bed at extra - long qinling tunnel
秦岭特长隧道弹性整体道床施工技术

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