针刷部分浸入水中旋转，针苗向水中带入空气，同时使水体水平运动。

The needle brushes are immersed into water and rotate, needles bring air into water, and make water balance.

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方法：采用回顾性分析法，分别统计钳检、刷检、冲洗及针吸活检4种不同取材方法对肺癌的检出率。

Methods: Adopt analytic approach of reviewing method, statistic the producing rate lung cancer by four different ways to draw materials including clamp check, brush check, rinse and needle aspiration.

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