1. Kev teeb tsa hauv tsev lossis kev siv sab nraum zoov nrog txoj kev tiv thaiv;
2. Sab nraum zoov qhov chaw qhib cua, eroded los ntawm cua, xuab zeb, nag, hnub ci, thiab lwm yam.;
3. Flammable, explosive gas los yog plua plav ib puag ncig;
4. Qhov chaw ntub dej thiab qhuav qhuav;
5. Qhov kub ntawm cov kav dej nruab nrab yog siab li 450 degree lossis ntau dua;
6. Qhov kub thiab txias yog qis dua -20 degree ;
7. Yooj yim dej nyab los yog ntub dej;
8. Ib puag ncig nrog cov khoom siv hluav taws xob (nuclear fais fab nroj tsuag thiab cov khoom siv hluav taws xob ntsuas hluav taws xob);
9. Ib puag ncig ntawm cov nkoj lossis cov chaw nres nkoj (nrog ntsev tsuag, pwm, av noo);
10. Lub sijhawm muaj kev vibration hnyav; lub sij hawm muaj hluav taws kub.
