海狸鼠毛被的质量与其年龄和季节有关，应在其毛被成熟时，采用正确的取皮方法，才能获得质量好的毛被。
The quality of beaver fur is related with animal′s age and the season when it is taken off. And the good quality fur can not be gotten without suitable preliminary processing methods.
海狸鼠毛被的质量与其年龄和季节有关，应在其毛被成熟时，采用正确的取皮方法，才能获得质量好的毛被。
The quality of beaver fur is related with animal′s age and the season when it is taken off. And the good quality fur can not be gotten without suitable preliminary processing methods.
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