图书 3-9486
Interpretation of GB/T 32862-2016, GB/T 32863-2016, GB/T 34543-2017, GB/T 34545-2017 Gem Grading National Standards (English Version)
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图书 3-9486
Standard No.
图书 3-9486
Language
Chinese,
Available in English version
Published By
CN-STDBOOK
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