Gearbox, Geared Motor, Speed Reducer manufacturer / supplier in China, offering Kpm Helical-Hypoid Gearbox, S Right Angle Worm Gearbox, RV Worm Gearbox (VF) Motovario Type and so on.
It is the last photo.
You have seen all photos.
gearbox running test ,noise testing ,vibration testing,etc
this gearbox actual noise less 60dB.