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GRC(GemResearchCenter)isanindependentgemologicalresearchlaboratoryspecializingindeterminingtheGradingandIdetificationof,andprovidingthereportsfor,diamond,coloredgems(particularlyruby,sapphire,andemerald)aswellasorganicgemsincludingpearls.
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即检科技（Goinspec）：提供螺栓应力、状态、完整性的检测技术服务培训及认证
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