admittance

alarm

area

attention

authorized

background

bio

biological

board

break

building

caution

chemical

concept

construction

containment

danger

dangerous

door

emblem

entrance

experiment

facility

forbidden

hazard

icon

illustration

industrial

industry

information

lab

laboratory

law

off

personnel

poisonous

red

risk

safety

science

security

sign

symbol

text

toxic

triangle

warning

waste

white

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