xuàn fēng zhuāng shì yì zhǒng jiāng shū yè lín cì xiàng nèi juǎn qǐ de zhuāng dìng xíng shì

旋风装是一种将书页鳞次向内卷起的装订形式。

Whirlwind binding is a traditional bookbinding style where pages are arranged like fish scales and rolled inward.