known sample
... known loss (在交货前或交货时的)已知损失 known sample 已知试样 known solution 已知溶液 ...
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恒电位深腐蚀法是目前已知的制备扫描电镜用试样的最有效的方法。
The stationary potential deep-etching method is most available than other method to prepare for metallograph analyses on SEM.
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