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Dongtai is a wholly owned co***ny which has more than 10 years experience in researching, making and wholesales of ultrasonic gem machine. We pay more attention to the quality, brand, and service, also the whole heart people-oriented service to customers. The equipment used in processing crystal stone, agate jade, miscellaneous man-made stone, other stone and shell, bone fossil, etc. Our co***ny owned the first-class technical personnel for the customer, design and make factory gem species. Since its establ...
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