... heating elements Bend to Multi-layer O shape Stable performance Good quality Functions:1. PLC control, POD touch screen operation, easy ... operation and maintenance2. Servo motor control, the number of turns of O shape and pitch are very accurate3. The number ... between two R≤2000mm, tube ends length≤100mm, O shape≤20mm, the layer length of O shape≤200mm5. Machine size: 2660*880*2160mm