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1. 采用优质锌合金一次压铸成型,内部组织细密,性能好,手感好
2. 无钥匙设计,室内简便上锁,室外紧急开启,使用方便,安全有保障
3. 表面封油处理,色泽持久,防尘防腐
4. 适用于门厚35mm以上