此外，具有多个横向槽的导向头单元可用于对实际上为圆形的管子进行焊接。
Besides, the guide head unit having crosswise grooves can be used in welding circular pipes.
特点：采用气动横向加压，将换向器压放转子轴内，能准确地对准转子槽与换向器相对位置更换工装方便。
Features: use pneumatic landscape orientation pressurization, press commutator into rotor shaft, can exactly aim at rotor slot and commutator, tooling changing conveniently.
以横向裂缝、坑槽、车辙的破损率作为因素，建立了西北地区高速公路沥青路面的路况评价模型。
A pavement condition evaluation model is established for the expressway in Northwest area, taking the damage rates of transverse cracking, potholes and rutting as main considering factors.
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