... portable field spectrometer 便携式场能谱仪 portable grinding wheel 移动式磨轮 portable magnetic tape recorder 携带式磁带记录仪 ...
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portable grinding wheel machine 手提式砂轮机
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Portable grinding tools need to be equipped with safety guards to protect workers not only from the moving wheel surface, but also from flying fragments in case of breakage.
便携式研磨工具应装有安全防护装置，这样不仅可防止工人接触运转的砂轮表面，而且他们也不会被破裂时飞溅的碎片击中。
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