... , waterproof sleeve tube, power delivery Joint, limit expansion joints etc.Registered trademark "Changmao" brand, selling products throughout 31 provinces ... other piping systems, use of units such as power plants, water plants, mills, water companies, engineering and high construction, ... made could reach to -30--250Mediaair ,compressed air,water,sea water,oil,acid,alkali etc.Main Data: DNLengthL(mm) ...