用迈步式扩孔刀头钻凿天井是一项新技术，该技术能够用小钻机钻凿大天井。

The use of sequential reaming head for raising is a new technology, which can make a small-sized drill to be used for boring a large-sized raise.

youdao

模塑宽拱形设计。活动范围较大。需要的压缩力小。标准配置为150磅，ANSIB 16.1法兰钻机。真空26“百克。”

Molded Wide Arch Design. Greater Motion From Wider Arch. Less Force to Compress. Standard 150lb. ANSIB 16.1 Flange Drilling. Standard Face to Face Dimensions. Vacuum 26 "Hg."

youdao

报告了我国近年来装备的标准化、可搬迁式、小模块化海洋钻修井机和海洋模块钻机等的技术特点及其应用现状。

The feature of modularized drilling rig and the difference between it and movable drilling rig are presented briefly in this paper.

youdao