With superior performance jointless rail will gradually supplant the common rail in railway construction but rail expansion,excel-out even breakage in it will bring tremendous harms.

• 无缝线路以其优越的性能将逐步代替普通线路成为铁路发展的必然趋势,但它出现的胀轨、跑道和断轨的病害也极其巨大。