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Service hotline The 132-1514-0892 Service time Monday to Friday: 8:30-17:30 | Dongguan Gervesen vacuum Technology Co., LTD Add: Building 8, No.25 Yanglang Road, Dalingshan Town, Dongguan City, Guangdong Province Email: Gray@gervesen.com Website: www.gervesen.com | 
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