china rohs - rohs of hazardous substances, or environment friendly use period icons set 5 7 10 15 20 25 50 years and e

arrows biphenyls cadmium china chinese chromium circle compliant concentration control diphenyl directive efup eip electronic environment free friendly harm hazardous health icon illustration industrial industry information label lead market materials measure mercury orange period pollution quality regulation rohs safety sign substances symbol time use value vector waste years