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On July 13, 2018, the State Administration of market supervision and the National Standardization Administration of China jointly issued the new corn standard GB 1353-2018, which is a national mandatory standard and the first revision after the implementation of GB 1353-2009 for nine yearsThe specific revision contents are: 3uv1, the volume weight requirements have been improved, and the adjustment of the isochronous difference is 30g / L; The old standard unit weight difference is 35g / L between primary and secondary corn and between secondary and tertiary corn; 3UV 3UV 2, the restriction of moldy grain index has been cancelled; 3UV new standard GB 1353-2018 corn quality index 3UV 3UV old standard GB 1353-2009 corn quality index 3UV 3UV 3, Appendix A and Appendix B of 2009 version have been cancelled3UV Appendix A: determination method of corn bulk density, Appendix B: technical conditions and operation methods of corn rapid drying and dewatering equipment 3UV 3UV appendix: corn GB 1353-2018 3UV 3UV 3UV 3UV 3UV 3UV 3UV 3UV 3UV 3UV 3UV 3UV extended reading: corn, feed corn, pig feed corn, don't be foolishly confused! 3UV (author: Ruonan)