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1055/736 State tower 33rd floor,
Silom Road, Bangrak,
Bangkok 10500

Tel : (662) 236-2941
Fax : (662) 236-2942
Email: info@ggtlaboratory.com, ggtlab@gmail.com

Office hours:
Monday to Friday  9.00 AM - 5.00 PM
Closed on Saturday and Sunday

Free car parking 4 hours at State Tower
 
 
 
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 1  Global Gem Testing Laboratory Co.,Ltd. - State tower 33rd floor
 
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