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About us
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smart Lock
Door
Door lock
Padlock
Hardware and accessories
Security series
Electroplating and ancillary processing
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Office and office building
Educational institution
custom system
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Group Industry
Yantai Tri-circle Science & Technology Co., Ltd.
Yantai Tri-circle Car Lock Manufacturing Co., Ltd.
Yantai Tri-circle International Trade Co., Ltd
Yantai Tri-circle Galvanizing Technology Co., Ltd.
Group Industry
Yantai Tri-circle Lock Manufacturing Group (Pujiang) Co., Ltd.
Yantai Tri-circle Property Management Co., Ltd.
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