4 In multicoat systems adhesion failure may occur betweennbspnbspcoats so that the adhesion of the coating system to thenbspnbspsubstrate is not determined.
多层系统
失效发生涂层
，
致使涂层与基层粘附性无法确定。
4 In multicoat systems adhesion failure may occur betweennbspnbspcoats so that the adhesion of the coating system to thenbspnbspsubstrate is not determined.
多层系统失效发生涂层，致使涂层与基层粘附性无法确定。
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