Mahsulot tavsifi
A comprehensive guide on the sanitary-hygiene requirements for educational institutions, including classroom and school hygiene, ventilation, and indoor temperature regulations
#sanitariya#o'quv xonasi#ta'lim muassasalar#bog'cha#gigiyena
Muallif

KSEROKS 001Tasdiqlangan muallif
- Hujjatlari
- 36 503
- Sotilgan
- 7 530









