Insufficient full inspection using oil-absorbing tissues has confirmed that the surface of Tray is free of oil, and you need to use an industrial flashlight to confirm that there is no oil residue
Insufficient full inspection using oil-absorbing paper has confirmed that Tray surface is oil-free, and industrial flashlights need to be used to confirm that there is no oil residue
It has been confirmed that there is no oil on the surface of tray by using oil absorbing paper. It is necessary to use an industrial flashlight to confirm that there is no oil residue