地下トンネルを掘削するシールドマシン（横浜市／神奈川）
Schlüsselwörter
shield,
underground,
route,
construction site,
concrete,
copy space,
digging,
industry,
tunnel,
civil engineering,
high speed,
infrastructure,
japan,
technology,
construction,
expressway,
operation,
dig,
space,
iron,
colossal,
steel,
unmanned,
underground,
rejuvenation,
carriageway,
depth,
segment,
development,
space,
factory,
industry,
plant,
industrial
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