Research and development plays an important role in the teaching of high school biology experiments, but most of the reagents used in the experiments are toxic or volatile. Experiments in middle school will cause certain damage to teachers and students. Continued use of traditional grinding equipment will no longer meet current teaching facts. Chuan Bran Biological combined with the characteristics and needs of high school biology experiment teaching, independently developed a grinding device-grinding filter that is more suitable for high school biology experiment teaching, and applied for a patent.
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