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  • Yantai Tri-circle Lock Manufacturing Group (Pujiang) Co., Ltd.
  • Yantai Tri-Hope Auto-Parts Co., Ltd.
  • Yantai Tri-circle Security Technology Co., Ltd.
  • Yantai Tri-circle Internet of Things Technology Co., Ltd.
  • Yantai Tri-circle Padlock Manufacturing Co., Ltd.
  • Yantai Tri-circle Property Management Co., Ltd.
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