... , i. e. 2/2; Double coatings on top side and one coating on button side, i. e. 2/1) ... elevator lobby, stairs ventilation channel, communication channels. etc. Type of base metalSteel gradeGrade of base metalapplicationHot-dip ainc ... screen, ceiling, elecator, stairway, vent gutterElectreal applianceRefrigerator, washer, switch cabinet, instrument cabinet, air conditioning, micro-wave oven, bread ...