the mechanical pre-cutting method
the mechanical pre-cutting method
机械预切法
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The Mechanical pre-cutting method used in soft ground is a kind of preparative support, it allows tunnel excavation work to be conducted efficiently under the safe pre-lining.
软土中的机械预切槽法是超前支护的一种，在预筑拱的保护下可以安全高效地开挖隧道。
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