적용 경사진 시트 밸브, 1/2 인치 자체 실링 파이프 환기 인쇄됨
With non-return valve and pipe ventilator in accordance with DIN 3266 as a HP safeguard combination in accordance with DIN 1988, Part 4 and DIN EN 1717 (RV and RB). Turn the appliance valve into a permanent and audience-specific advertisement for your good name.