... ). Ensure that they are correctly fitted, adjusted, maintained and inspected in accordance with these instructions. If these instructions are ... stored in a cool, dry environment, out of frost and light and protected from dust, grease or chemical products. When ... Directive 89/686, notably regarding ergonomics, innocuousness, and comfort, and with EN352.2:2002 (H=36dB, M=34dB, L=33dB, SNR=37dB) standard. ...