1.
When it has been decided where we are going to drill, we put up at the surface an oil derrick.
决定了钻孔位置后，我们就在地面上竖起井架。
2.
New construction technology of setting large steel-structure shaft frame during shaft sinking
凿井期间起立大型钢结构井架施工新技术
3.
We put up at the surface an oil derrick.
我们就在那块地面上竖起一个井架。
4.
Research of On-line Monitoring and Control System for Headframe Hoisting and Its Application
井架起吊在线监控系统的研究与应用
5.
Powerful cranes raised it, and held it suspended over the mouth of the cylinder.
几架强大的起重机抓起它，把它悬在铁井的上空。
6.
Qualitative Calculation of the Strength of the Metal Gin Pole Used in Large-Steel-Derrick's Hoisting
大型钢井架起吊用金属抱杆强度稳定性验算
7.
The substructure is a box-on-box design for easy installation.
采用无棚绳前开口型井架，整体起升，低位安装，方便快捷。
8.
"drilling rig, platform"
"钻井井架,钻井平台,见 oil (drilling) rig"
9.
bald-headed derrick
无天车工作平台的井架
10.
stacking capacity of derrick
井架的钻杆立根容量
11.
leg base anchorage
井架大腿底脚的固定
12.
self-gured structural mast
自带绷绳的轻便井架
13.
free standing mast
不用绷绳的轻便井架
14.
outside monkey board
折叠式井架外侧二层台
15.
On the Derrick Installation of ShaftⅣ_G In main Shaft of a Coalmine
浅谈塔然高勒煤矿主井IV_G凿井井架安装
16.
raise/lower the undercarriage
收起[放下]起落架.
17.
The Intensity Testing of Main Well Headframe in Dai Zhuang Mine Shangdong
山东岱庄生建煤矿主井井架强度检验
18.
A framework to support or strengthen a mine or shaft
井壁基架用来支承或加固矿井的构筑