... in indoor, also can be mounted on the roof, can use hand an installation Angle of the large ... Can install defend net, billboard, also can do the roof waterproof cast-in-situ engineering; Can the pump can ... in indoor, also can be mounted on the roof, can use hand an installation Angle of the large ... install defend net, billboard, also can do the roof waterproof cast-in-situ engineering; Can the pump can ...