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利根屏蔽钻进系统始于世界上最长的隧道工程(从日本州到北海道的青一函海底隧道),这种屏蔽钻进系统是最可靠的先进钻进技术。利根屏蔽钻进系统在钻进作业中防(Shield Drilling System)
The RIGEN shield drilling system started with the longest tunneling project in the world (Greencross Tunnel from Japan to Hokkaido) and is the most reliable advanced drilling technology. Shield Roots Shielding Drilling System In Drilling Operations Shield (Shield Drilling System)