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Guangzhou Branch:
Tel: +86-20-66652690
Fax: +86-20-34397230
Mob:+86 13434227916
E-mail:enquiry@gnsealant.com

Gunuo Tianjin Industrial Co.,Ltd.
Email: enquiry@gnsealant.com
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GNS product are complied with American standard, European standard, China standard and some other international standards. And how do you know which manufacturer can supply the good quality products with high safety standard? As it is chemical product, it is necessary to be certified by the authoritative third party. 
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