Parts of the machine were grinding together noisily.

机器零件摩擦发出刺耳的声音。

《牛津词典》

In order to guarantee surface precision of using locus shaping method machining optical parts, the factors of fine grinding machine which affects surface error of part is theoretically analysed.

为了保证用轨迹成型法加工光学零件的面形精度，对精密磨削机床影响工件面形误差的因素进行了理论分析。

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Rongzhao company specializing in the production, maintenance and sale of its grinding machine spare parts and related auxiliary equipment.

荣兆公司专业生产、维修研磨机及销售其相关零配件与辅助设备。

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