micro positive pressure device
... slider-type rheostat滑线式变阻器 slight pressure device微正压装置 soil resistivity土壤电阻率 ...
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纳米级尺度实物标准是纳米尺寸传递体系中的关键环节，也是评价和校正压电驱动等微扫描微定位装置的重要工具。
Nanometer scale step standards are the keys for dimension transfer, and they are the important tools to evaluate and calibrate micro actuator and micro position devices such as piezoelectric scanner.
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