Screen Angle indicator: a protractor with many co - centre circles.
2
管状嵴的线粒体、多层同心环状的滑面内质网以及高尔基体较为常见。
The mitochondria with tubular cristae, multilayer concentric circular smooth endoplasmic reticulum, and golgi complexes are often observed.
3
摘要纬线与纬线相交可形成球面等距网栅，而采用“同心扫描”的运动方式可在凹球面上生成纬线。
An isometric mesh on the concave of a spherical substrate was formed by latitude line intersection each other, in which latitude lines was generated by a concentric optical scanning method.
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