Pre-sales technical support

Mr. Lu：+86-010-82393237

? ? ? ? ? ? ?+861370133870

E-Mail：zongdongjiao@granpect.com
Fax telephone：010-82393299
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After-sales service support
Mr. Li：+8618682945003
E-Mail：liyuli@granpect.com
Fax telephone：+86-010-82393299