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กรุณาตอบคำถามนี้   11  +  20  = 
The Knowledge – Leaders in Corporate Training & Language Development Solutions
Address: Lake Rajada Office Complex, Floor 5/6,
193-195 Ratchadapisek Road, Klong Toey, Bangkok, 10110.
Tel: 02 264 0276-7 • Fax: 02 264 0280
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