开心激情六月久久中文一区,欧美日韩激情一区二区二区,最新中文国产精品视频一区二区,337P日本大胆欧洲亚洲

<th id="vl0nn"><span id="vl0nn"><table id="vl0nn"></table></span></th>


<td id="vl0nn"></td>
  • <sub id="vl0nn"><menu id="vl0nn"><font id="vl0nn"></font></menu></sub>

      Language

      Your Location: Home  > Technology

      • The three elements of color

        The three elements of color

        The three elements of color: color has hue (hue), lightness (black and white, li...

        More
      • Contact scars, scratches, pen scratches

        Contact scars, scratches, pen scratches

        The phenomenon that the coating is damaged by external action and loses its inte...

        More
      • Over Drying

        Over Drying

        During the drying process of the coating, the drying temperature is too high or ...

        More
      • Poor Sharpness

        Poor Sharpness

        The phenomenon that the sharpness of the coating (smoothness, gloss) is poor, th...

        More
      • Absorb

        Absorb

        When applied, the paint is over-absorbed by the substrate and appears matt or un...

        More
      • Fade

        Fade

        When the paint surface is wiped with wax and a cloth, the color between the pain...

        More