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中国消费者报北京讯记者任震宇）9月6日，由中国国际贸易促进委员会、国家认证认可监督管理委员会共同主办的中国国际服务贸易交易会“2023合格评定服务贸易便利化论坛”在北京国家会议中心举办。论坛聚焦“合格

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在化学分析领域，每一次精准的测量都离不开标准物质的校准与验证。特别是在复杂有机化合物的分析中，甲醇中邻二甲苯溶液标准物质以其独特的稳定性和适用性，成为了众多实验室的首选。多年的从业经验让我深知，选择正

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