... connection, welding box, hydraulic wedge block type expansion shaft, hydraulic auto mouth of tongs, press slitting strip organ, hydraulic pull organ ... for whole line. The headof sheet put on mouth of tongs of recoiler shaft, hydraulic oil box to expansion three sector panel, ... when finished recoiler. The material of main recoier’s shaft is middle alloy steel 42CrMo. Mouth of tongs with gear, sector ...