PICTOGRAMS AND HAZARD CODES
图片和危险标志代码
B    Biohazard
E    Explosive
标志图片F    Highly Flammable
F+  Extremely Flammable   
Xn    Harmful
Xi    Irritant
N    Dangerous for the environment
O    Oxidizing
R    Radioactive
T    Toxic
T+  Very Toxic