Pneumatic drifter is a new short distance and small bore underground construction machine.

气动穿孔机是一种新型短距离、小直径地下施工机械。

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As a new machine, hydraulic double wheel trench cutter is widely used in the construction of the underground continuous wall.

液压双轮铣作为一种新型的机械设备，在地下连续墙工程施工中得到了日益广泛的应用。

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With the superiority of technology and economy, EPB shield machine has been in the overwhelming dominance and become the mainstream in construction technology of urban underground engineering field.

而其中土压平衡式盾构机(epb)又以其技术及经济上的优越性，在盾构施工法中占有绝对的优势地位，成为城市地下工程施工技术的主流。

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