1. Cov yeeb nkab qub thiab cov server scaling rau cov yeeb nkab.
2. Cov khoom siv yeeb nkab yog pyknotic thiab symmetrical, thiab lwm yam khoom siv uas tsis zoo acoustical conductivity;
3. Qhov saum npoo ntawm phab ntsa yeeb nkab muaj txheej zoo li xim;
4. Daim ntawv thov tsis yog cov yeeb nkab dej puv nkaus;
5. Sab hauv ntawm cov yeeb nkab yog nrog ntau cov pa npuas lossis cov khoom loj feem pua;
6. Cov yeeb nkab/raj ncaj tsis ntev txaus.
7. Qhov chaw ntawm kev teeb tsa lub 'meter' yog nyob ze rau sab saud ntawm cov yeeb nkab uas tau teeb tsa lub valve;
8. Lub tshuab hloov pauv lossis suab nrov cuam tshuam rau ntawm qhov chaw.
9. Cov khoom ntsuas yog ib hom sib tov lossis qee yam kua uas muaj kev coj ua suab tsis zoo, xws li cov dej phwj nyoos, av nkos, slurry, thiab lwm yam.
10. Cov kua dej ntawm cov yeeb nkab qhov kev taw qhia ntws yog los ntawm sab saud mus rau hauv qab lossis ntsia nws ua qhov chaw siab dua ntawm cov yeeb nkab, ua rau cov dej ntawm cov yeeb nkab tsis puv lossis npuas dej ntau dhau ntawm qhov chaw teeb tsa.
Lub sijhawm tshaj tawm: Lub Rau Hli-30-2022