มาตรฐานและใบรับรอง

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3 1238 June 23, 2021
2 1803 June 18, 2021
2 1486 June 11, 2021
4 1107 June 7, 2021
2 1541 May 25, 2021
3 1939 May 25, 2021
5 2868 May 25, 2021
3 1407 May 22, 2021
4 981 May 21, 2021
3 1746 May 20, 2021
3 1090 May 11, 2021
1 857 April 22, 2021
1 834 April 17, 2021
1 829 April 12, 2021
3 807 April 4, 2021
4 1336 April 2, 2021
1 890 March 30, 2021
1 603 March 28, 2021
3 1668 March 26, 2021
3 778 March 26, 2021
3 880 March 15, 2021
4 1457 March 12, 2021
2 674 March 11, 2021
3 978 February 28, 2021
3 1608 February 21, 2021
3 282 January 1, 2021
7 403 December 26, 2020
3 298 December 24, 2020
3 222 December 23, 2020
2 314 December 17, 2020