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食品接触材料合规难题?质谱分析技术课来破局!
仪器信息网·2025-10-03 03:58

Group 1 - The article promotes a free book giveaway, specifically the "Liquid Chromatography Practical Handbook" published by Instrument Information Network [2] - It highlights the importance of setting the account as a star to ensure users receive future updates [1] Group 2 - The course offered is a premium course without exams or certificates, and it allows for unlimited learning within a specified validity period [6] - The course is a virtual product and is non-refundable after purchase [6] - Users can apply for a VAT electronic invoice upon purchase [6]