高铁双块式无砟轨道的施工进度大概是天天多少米？

Does pair of piece style have no the tiny fragments of stone orbit construction rate of progress?

youdao

高铁双块式无砟轨道的施工进度大概是天天多少米？

Does pair of piece style have no the tiny fragments of stone orbit construction rate of progress?

youdao