The whole book was evenly fold into rectangle form so it can be opened and closed like a folding fan.
全书按照特定行数，均匀地折叠成长方形折子，可象扇子样开启或折叠，从中反映我国书籍装帧之精妙。
The thrust faults with a fan-shaped often are evolved in the steep wing and are formed after the fold deformations have reached a definite stage.
扇状逆冲断层往往在褶曲陡翼发育，产生于褶皱变形达到一定阶段之后。
The thrust faults with a fan-shaped often are evolved in the steep wing and are formed after the fold deformations have reached a definite stage.
扇状逆冲断层往往在褶曲陡翼发育，产生于褶皱变形达到一定阶段之后。
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