获取头发样例 Get Hair Example

比例取样器 proportional sampler ; proportional sampling device ; sampler proportional

按比例取样 proportional sampling

取样、举例 sample

媒体样例抓取 grabbing media samples

比例取样法 total bag sampling ; proportional bag sampling ; proportional smapling

按时间比例取样 [电子] time-proportioned sample