半断面插刀盾构是铁道部隧道工程局与有关单位共同研制的用于地铁隧道上半断面施工的机械，文章介绍它的结构和应用问题。

The half-section mechanized shield with inserted cutters is a machinery used for constructing the upper half-section of the metro tunnels.

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因此，中国铁道建筑总公司组织石家庄铁道学院、铁十五工程局有关科研人员，在“引大入秦”工程24号隧洞开展软管通风技术的研究和试验。本文是该课题的部分测试结果。

Hence, flexible pipe ventilation technique is developed and tested in the No. 24 tunnel of a water engineering some of the test results are introduced in this paper.

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