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近年来,国外的橡胶和塑料基单层屋面卷材呈现迅速增长的趋势,但沥青油毡仍处于主导地位。如,日本的沥青油毡在防水系统中约
In recent years, foreign rubber and plastic-based single-story roofing membranes have shown a rapid growth trend, but bitumen linoleum is still in a dominant position. For example, the Japanese asphalt linoleum in the waterproof system is about