Viscosity, also known as internal friction, is the pressure caused by the corresponding movement of one layer of liquid against another. This is a characteristic of the internal structure of...
UV is the abbreviation of the English "Ultraviolet Rays", the Chinese translation is "ultraviolet", the so-called UV ink, is the cross-linked polymerization reaction by ultraviolet irradiation...
No.
1KG/ tank, 12KG/ piece, 20/25KG/ barrel, 15KG/ piece.
Yes.