求翻译：（2） 牵引小车在运行时会偏移，小车滑架也可能接触到工字钢轨道，在特殊情况下，滑架滚轮可能严重磨擦牵引轨的腹板，因此，必须对腹板和滚轮的接触面进行润滑以减少磨擦，如没有润滑，承载轨只能用1-2年。是什么意思？

(2) of the towing car at run time will offset the trolley carriage may be exposed to the beam track, in exceptional circumstances, the carriage wheel could seriously friction traction rail webs, therefore, must be on the web and the wheel The contact surfaces are lubricated to reduce friction, such

(2) * tow dolly will be in the running is offset, the car is also likely to come into contact with the track, H-beams in special circumstances, the rollers may be serious friction between the belt plate rail traction and, therefore, of the need for the belly Board and the scroll wheel to contact sur

(2) Tows the car when the movement can displace, the car slide rails also possibly contact the I-steel track, in the peculiar circumstance, the slide rails hoop possible to rub seriously tows the axle the web plate, therefore, must carries on the lubrication to the web plate and the hoop contact fac

(2) pushing trolley at run time is offset, the car slide may also contact the I-steel rail, in exceptional cases, sliding friction wheel could seriously traction rail webs and, therefore, must contact surface of webs and roller lubrication to reduce friction, if there is no lubrication, hosting Rail

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