I did frame three of my four walls on the ground, then raised them with the chain hoist.
我确实在地面装好四面墙的三个框架，再用链式起重机把它们吊起来。
The frame of mast derrick that is designed for hydraulic wheel tractor hoist adopt welding of armor plate, its section is oblong armor plate, and its material is HG60.
为满足液压轮式通井机的使用要求而设计的桅杆式井架采用板焊结构，主体截面为长方形的方形钢，材料为HG60。
The tail gas chimney tower frame in Zhong county natural gas purifying project was needed to hoist.
在忠县天然气净化厂工程中要吊装尾气烟囱塔架。
The tail gas chimney tower frame in Zhong county natural gas purifying project was needed to hoist.
在忠县天然气净化厂工程中要吊装尾气烟囱塔架。
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