... duct corner 20 TDC/TDF,TDC-20/TDC-30/TDF-40,grooving and wothout grooving,TDC corner,duct clip.decoiler-roll ... divided into four types: T-20,T-30,T-35,T-40 with their corresponding duct corner T-20DC,T-30DC and T-40DC.TDC made by SBKJ ... .2mm4kw3000kg3200×600×1200mm TypeNameCapacitySizeShapeT-20DCDuct comer2.5mma=95mm T-30DCDuct comer3mma=105mm T-40DCDuct comer3.5mma=123mm LT-30Duct comer3mma=105mm ...