Cov hnab ntim khoom muaj ntau yam kev siv:
Kev Lag Luam Tshuaj: Siv rau ntim thiab thauj cov tshuaj granular lossis hmoov hmoov.
Kev Lag Luam Khoom Siv Hauv Tsev: Siv rau kev thauj khoom ntau ntawm cov cement, xuab zeb, thiab pob zeb.
Grain Industry: Siv rau kev khaws cia thiab thauj cov khoom ua liaj ua teb xws li nplej thiab pub.
Kev lag luam mining: Siv rau ntim ntim ntau ntawm cov thee thiab ore.
