... 梯斗式起重绞车 ladder winch 拖拉机起重绞车 tractor hoist; tractorhoist 直升机起重绞车 air-hoist ...
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Petroleum tractor hoist 石油通井机
wheel tractor hoist 轮式通井机
wheel hoist tractor 轮式通井机
Wheeled Hoist Tractor 轮式作业机
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。
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