| | | 2021 1 | | | | | | | | | | | | | | | | | 2021 11 8 | | | | | | | 2021 4 | | | | | | | —— | | | | | —— | | | —— | | | | | | | —— | | | | | | | | | | | | | | | | 10 | | | | | 100 10 | 2 | | | | | | 3 | | | | | | 12 | 2021 | | 1 | | | 3 | | | | | | | | | | | 1. | 2 | | | | | | | | | | | | | | | | 2. | | | | GB/T31600-2015 3 | | | | | | | | | 3. | | | | | | | | | | | | | | | | 4. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 4 | | | | | | | | | | | | | | | | | | | | | 12 5 | | | | | 1. | | 0471 - 6652285 | nmgnmtjgc@163.com | 2. | 0471 - 6628916 | nmgbzch@163.com | | | 1 1201 | | 3 | GBT 31600 - 2015 | 4 | | |