Rail grinding is a practical and economical technique for not only removing surface defects but also maintaining favorable rail profiles.

不管是对于除去钢轨表面缺陷还是保持钢轨合适的外形轮廓、保证行车稳定性来说，钢轨打磨都是经济和实用的技术。

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Vaporizing nickel onto the surface and removing that screen leaves behind a near-perfect grid of metal, hexagonal dots.

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For instance, the process to increase burn and wound healing includes removing the dead or decaying flesh in a way that leaves a smooth, evenly thick surface for grafts and healing.

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