1. Kev tsim kho: hlua hlau hlau yog siv rau kev hoistting cov khoom siv hnyav thiab cov khoom siv, xws li cranes thiab elevators.
2. Tsuas: Cov hlua hlau hlau yog siv los thauj cov zaub mov, thee, thiab lwm yam ntaub ntawv hauv cov khoom siv mines thiab hauv av.
3. Maritime thiab ntug dej ua haujlwm: Cov hlua hlau hlau siv tau siv rau hauv cov nkoj, roj tua roj, thiab lwm cov khoom siv tua hluav taws xob kom nqa cov cuab yeej hnyav thiab cov haujlwm txhawb nqa.
4. Hav Zoov: Cov hlua hlau hlau hlau siv rau kev ua haujlwm log thiab ntoo hauv cov haujlwm hav zoov.
5. Nws yog siv rau hauv txoj kev sib txawv ntawm txoj kev hlua.
6. Lub zog thiab hluav taws xob: hlua hlau hlau siv hauv cov txheej txheem teeb tsa ntawm cov pa hluav taws xob ntawm ntug dej.
