pass design of rail rolling 重轨孔型设计
The forming principle and pass design of cold bend section steel is introduced and the deformation drawing of rail used by highway is given.
介绍了冷弯型钢的成型原理、孔型设计，并给出了高速公路用护栏板的变形图。
The development process including the pass design and trial production of 50AT switch rail is introduced.
本文介绍了50AT道岔钢轨的开发研制过程中孔型设计及试制情况。
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