在扩管生产中，需要实时了解每根顶杆的长度、外径、使用次数等信息。

The length, diameter and using time of mandril are needed in the process of manufacturing the pipe.

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施工中针对网壳结构特点及现场施工条件，采用低空外扩拼装、拔杆群接力提升的方法完成了安装。

Based on the structural characteristics and site conditions, low level spread assembly and pulling bar group relay lifting method is adopted to install the shell.

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在研制锚杆机械扩孔器的基础上，进行了扩体型锚杆的工艺试验和抗拔试验研究。

The technological and uplift tests of underreamed anchors are carried out based on the development of mechanical underreamed devices of anchorage.

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