W001 – General warning sign W002 – Explosive materials W003 – Radioactive material or ionizing radiation W004 – Laser beam W005 – Non-ionizing radiation W006 – Magnetic field W007 – Floor-level obstacle W008 – Drop or fall hazard W009 – Biological hazard W010 – Low temperature hazard W011 – Slippery surface W012 – Electricity hazard W013 – Guard dog W014 – Forklift truck and other industrial vehicles W015 – Overhead or suspended load W016 – Toxic material W017 – Hot surface W018 – Automatic start-up W019 – Crushing by moving parts W020 – Overhead obstacle W021 – Flammable material W022 – Sharp element W023 – Corrosive substance W024 – Crushing of hands W025 – Counter-rotating rollers W026 – Battery charging W027 – Optical radiation W028 – Oxidizing substance W029 – Pressurized cylinder W035 – Falling Parts W039 – Falling Ice Spikes