- 87028010485The lower connecting plate
- Drawing No：87028010485
- Q4501442Round head rivets
- Drawing No：Q4501442
- 87028010482Strengthen carling
- Drawing No：87028010482
- 87028010338Right connecting plate
- Drawing No：87028010338
- 87028011108Reinforced beam assembly
- Drawing No：87028011108
- 87028010337Left connecting plate
- Drawing No：87028010337
- 87028010449The upper connecting plate
- Drawing No：87028010449
- 87028011109Four crossbeam assembly
- Drawing No：87028011109