阐述了高速与重载铁路钢轨不同曲线轨头非对称打磨技术的原理及应用。
The different rail curve asymmetrical grinding was introduced for high-speed and heavy-haul rail.
“Simplicity”经常被认为是终极的正装表以及高级钟表打磨技术的基准。
The Simplicity is always regarded as the ultimate dress watch and as a benchmark in terms of finishing.
他们学习一些诸如大理石打磨，金属冶炼和铜器制造的实用技术，而不仅仅是造船术。
They're studying practical things like marble work, metal work, and copper work, not just shipbuilding.
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