Việt
công trình khai đào tunen
lò tunen
sự đào hầm
Anh
tunnel excavation
gallery
underground excavation
Đức
Erdarbeiten unter Tage
Pháp
terrassement en souterrain
tunnel excavation,underground excavation
[DE] Erdarbeiten unter Tage
[EN] tunnel excavation; underground excavation
[FR] terrassement en souterrain
tunnel excavation /xây dựng/
tunnel excavation, gallery