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Shenzhen Dowdon Tech Co., Ltd.
Changzhou Yasen Electronic Co., Ltd.
Shenzhen Chitongda Electronic Co., Ltd.
Wenzhou Haibang Police Equipment Co., Ltd.
Hangzhou Timing Security Technologies Co., Ltd.
Hangzhou Ruidun Technology Co., Ltd.
Changzhou Tinghao Electronic Co., Ltd.
Senken Group Co., Ltd.
Shenzhen Taian Electronics Co., Ltd.
Shenzhen Zhonglian High-Tech Security Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.