he defective electric heating element of the electric towel rack cannot be corrected:

A Reasons for magnesium powder: the original powder of magnesium powder is of poor quality, the content of ferromagnetic substances and other harmful impurities is high, the density is too small or the density is uneven.

B Disadvantages of pipe material: such as cracks in the pipe, burrs in the pipe, or bubbles, shrinkage holes, slag inclusions, etc. in the pipe.