Surfaces to be welded or thermally cut shall be cleaned of all foreign material such as grease, oil, dirt, scale, slag and paint that would be detrimental to either the weld or base material.
需焊接或热切割的表面应排除所有可能会损坏焊材或母材的杂物，如脂、油、灰尘、水垢、熔渣和油漆等。
Silicone with reaction active base is used as major material to manufacture the silicone construction waterproof paint, which can be used as waterproof paint for the construction.
以带有反应活性基的硅氧烷作基料，研制了一种有机硅建筑防水涂料，可用于建筑物外墙防水。
The back of the base material is printed with woodiness grains which cover a waterproof paint layer.
基材背面印有木质纹理，木质纹理覆盖有防水漆层。
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