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The mechanism of the surface pretreatment is also studied.
对这种表面预处理的机理进行了初步探讨。
youdao
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Directly after the surface pretreatment, the first coat must be applied.
在对表面进行过预处理后，必须立即进行第一层涂层的涂覆。
youdao
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Directly after the surface pretreatment, the first coat must be applied.
在对表面进行过预处理后，必须立即进行第一层涂层的涂覆。
youdao