亚洲免费视频免在线观看，国产欧美精品丝袜久久，亚洲ⅴa欧美ⅴa人人爽久，欧美精品在线观看，欧美日韩国产原创，国内精品精彩无码视频，中文字幕亚洲综合久久，久久永久免费人妻精品视频

<th id="9lgpx"></th>^{<strong id="9lgpx"></strong>}

Your Location： Home > Technology

Crater, Depression, Pit

On the surface of the paint film, there are concavities and convexities with a d...
More
Shrinkage

Affected by foreign matter (such as oil, water, etc.) existing on the surface of...
More
Whitening, Whitish

During the coating process and just after the coating, the surface of the coatin...
More
Exposed Bottom, Bad Bottom Cover

The phenomenon that the coated surface is not painted due to missing coating is ...
More
Particles

The phenomenon in which the protrusions in the paint film are distributed in the...
More
Sagging

The paint applied on the vertical surface flows downward, causing uneven streaks...
More

<th id="9lgpx"></th>^{<strong id="9lgpx"></strong>}

Crater, Depression, Pit