Sticking surface should be clean, smooth, dry, no fat or other pollutant.

被粘物表面应清洁干净、平滑、干燥、无油脂或其它污染物。

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Rods and wires shall have a smooth finish, free from surface imperfections, corrosion products, grease or other foreign matter which would affect the quality of the weld.

焊条与焊丝应该表面光洁，不能有表面缺陷和锈垢、油脂以及其他杂质，因为它们会影响焊接质量。

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If the material has a pile or raised surface on one side and is smooth on the other, it is essential that the correct model is selected to ensure that the measuring wheel runs on the smooth side.

如果该材料具有桩或提出的表面，另一面光滑另一方面，至关重要的是正确的模式选择，以确保测量车轮上运行顺利一方。

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