以下为句子列表：
英文: A set of conventional processing methods of vanadium and vanadium alloy specimens, including mechanical polishing, mechanical chemical polishing, chemical etching as well as relevant techniques and experiences is introduced.
中文: 摘要介绍了一种钒及钒基合金金相试样的常规制样方法，即试样的机械磨光，机械化学抛光，化学侵蚀等技术和经验。
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英文: Also, severe biofouling, physical abrasion, and chemical etching of the glass may erode the sensing surface.
中文: 严重的玻璃生物淤积、物理磨损和化学腐蚀可能影响感觉表面。
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英文: For example, it is challenging for the chemical etching process to drop below a 1.5 aspect ratio while, with laser cutting and electroforming, apertures can be produced that have a 1:1 aspect ratio to the stencil thickness.
中文: 比如，表观比率低于1.5对于化学腐蚀试一大挑战，而激光切割和电铸可制成表观比率为1.1的钢网。
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