Incidents occurred in the laboratory, where chemical spills and unprotected should put a label warning that smoking and the hazards to prevent harm to yourself and others.
NOTE situation in the laboratory. The chemical spills and unprotected. Protective clothing should be worn and label warns that the danger zone. To prevent Danger to themselves and others.
Incident happened in the lab, which is a chemical spill, and no protection. The protective suit on and labeled warned that a danger zone to prevent อันตรายต่อตัว yourself and others.