... concrete,asphalt,brick pavers and tile. 3.20 years history. UL,CE,ISO,ROHS 4.outerdoor heating General IntroductionDefrost Snow is used ... and Graingerhave several self-owned intellectual property rightshave passed ISO9001,UL,CE,ATEX,IECEx.GOST&ROHS certificationThermostat Specifications(Two types for your ...