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Sleeper bolts are a kind of railway accessories. Railway accessories are an integral part of railway lines. As an integral engineering structure, the track is laid on the subgrade, which plays a guiding role in the running of the train and directly bears the huge pressure of the rolling stock and its load. . Under the power of the train running, the sleeper bolts have sufficient strength and stability to ensure the smooth and uninterrupted operation of the train at the specified speed.