Rac tywel wedi'i ddylunio'n amhriodol
Jan 10, 2023
Gadewch neges
Generally, the heating wire in the electric heating tube is designed in a spiral shape, that is, a spring shape. If the ratio of the diameter D of the winding mandrel to the diameter d of the heating wire is D/d>8, bydd y ffenomen o sagging yn digwydd wrth ychwanegu powdr.
