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| Beijing Company |
| Phone:010-80728275 80722515 8 |
| Fax:010-80722514-614 |
| Address:1Zhanqian Road,Shahe Town,Changping Distrt,Beijing City |
| Zip Code:102206 |
| Email:yhdc@yhdc.com |
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| Hebei Branch |
| Phone:0355-8583488 8583499 |
| Fax:0355-7929499 |
| Address:Qinhuangdao Harbor District Tsing Lung Industrial Park |
| Zip Code:066004 |
| Email:yhdc1@yhdc.com |
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