隧洞

suìdòng

tunnel

* * *

隧洞

suì dòng

tunnel

隧洞分岔段 tunnel fork;

隧洞渐变段 transition region of tunnel;

隧洞掘进机 tunnel boring machine;

隧洞矢板 poling boards;

隧洞运渣车 jumbo;

隧洞装夹（法） cubbyset

* * *

隧洞|隧洞 [suì dòng] ► tunnel