GIT Gems & Jewelry Magzine Issue 20 (June-July 2017)

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THE GEM AND JEWELRY INSTITUTE OF THAILAND (PUBLIC ORGANIZATION)

ISSUE 20 • JUNE-JULY 2017

COVER STORY

งานแถลงข่าว GIT’s World Jewelry Design Awards 2017

GIT IN FOCUS เรียนรู้การตรวจสอบ Ruby


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