トンネルボーリングマシン
2. Tunnel boring machineA tunnel boring machine (TBM) also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameters can range from a metre (done with micro-TBMs) to 19.25 m to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs.
Read “Tunnel boring machine” on English Wikipedia
Read “トンネルボーリングマシン” on Japanese Wikipedia
Read “Tunnel boring machine” on DBpedia
Read “Tunnel boring machine” on English Wikipedia
Read “トンネルボーリングマシン” on Japanese Wikipedia
Read “Tunnel boring machine” on DBpedia
トンネル・ボーリング・マシン
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