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CASECONTACT USShiYan Precision Instruments Co., Ltd. of Dongguan 
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ShiYan Precision Instruments Co., Ltd. of Dongguan
Address：NO.23 XingYuan Road, Houjie Village, Houjie Town, Dongguan City. Guangdong Provience, China
Tel:0769-85960096/0769-85990016
Fax:0769-85990016
Mr. Xie:18826890096
Ms. Li :18122859758
Website: www.syan17.com
E-mail : dgsy17@163.com