电路结构简单，制作方便，实用性强。
该方法计算简单，制作方便，且样板精度高，实用性强。
The method is simple in calculation and convenient in manufacture. The shell sample plate is accurate and practical.
卵粒玻片有容易观察、制作方便和可供胚胎发育研究等优点。
The egg granules slide was easy to observe and was convenient for manufacture and can be used for studying of embryo development et al.
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