A single bending bar and double bending bars can be used.
可用单弯曲杆和双弯曲杆。
Drilling derrick that working many years often has the defect of bending bar.
服役多年的钻机井架常会出现局部杆件弯曲现象。
The master frame is characteristic of shear structure deformation and the master support features bending cantilever bar deformation.
总框架具有剪切结构的变形特征，总支撑则具有弯曲悬臂杆的变形特征。
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