Description: link to the website of the company; Name: website 
Description: web site address where information about the product or contact is given; Name: adress of additional link
Description: norm/stipulation describing the explosion protection. The explosion protection type, the device category, the temperature class as well as the device / explosion group are taken from this norm. The type and number of the norm/stipulation with issue year and issue month must be given; Name: Reference norm of the explosion protection