彩神彩票入口

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                精调件
                铁路紧固件轨道扣压件→ 一、铁路轨道紧固件扣压件的作用 铁路钢轨扣件是轨道上用以▼联结钢轨和轨枕(或其他类型轨下基础)的零件,又称中间联结零件。其作用是将钢轨固定在轨枕上,保持轨距和阻止钢轨相对于轨枕的纵横向移动。
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                彩神彩票入口

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