軟石開挖 的英文怎麼說
中文拼音 [ruǎndànkāiwā]
軟石開挖
英文
soft-rock excavation-
This is why a special tunnelling machine capable of excavating through both soft ground as well as hard rock was used. without this machine, the tunnelling would have to be done by cut - and - cover method, causing major traffic and environmental disruption. with this tbm, all these impacts can be avoided
故此選用這臺既可在軟土又可在硬石層運作的隧道鉆挖機，避免以明挖隨填的方法開鑿隧道，免卻對交通及環境造成嚴重影響。
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