驾驶员在野外行车途中,遇有机动车轮胎爆烈必然需要更换备用轮胎。但是,许多机动车由于原轮胎螺丝上得过紧、锈蚀或其它原因,往往难以将轮胎螺母卸下.拆卸螺绠时如果用力过大,难免损坏螺母扳手或机件,眼巴巴地瞅着备胎却无法更换,耽误了正 Drivers driving in the wild on the road, in case of explosive motor vehicle tires will inevitably need to replace the spare tire. However, in many vehicles, it is often difficult to remove the tire nut due to over-tightening of the original tire screw, rusting, or other reasons. If the force is too great when disassembling the screw nut, it will inevitably damage the nut wrench or the mechanical part, But can not be replaced, was delayed