Book letter putamina by quality requirements, the four sides then use bamboo scratch tight wrapping to prevent curling down and up empty. 书封壳在按质量要求做好后,四边再用竹刮刮紧包边,防止包边不紧及起空。
Book letter putamina by quality requirements, the four sides then use bamboo scratch tight wrapping to prevent curling down and up empty. 书封壳在按质量要求做好后,四边再用竹刮刮紧包边,防止包边不紧及起空。