... stability,long life characteristics and so on Characteristics, parameters, certification: 1, Hushun high and low water pressure switch ... and products are environmentally certified. 6, Switch certification are: UL, VDE, TUV, CB, CCC, CQC, CE, ROHS, ISO9001: 2008, OHSAS 18000 ... , the EU SGS environmental protection certification. 7, It is the ...