Single ply embossing, double ply embossing, steel to steel embossing.

单压花，双面压花，钢对钢压花。

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Install, repair or replace single-ply roofing system using waterproof sheet materials such as modified plastics, elastomeric or other asphaltic compositions.

使用防水片材，如改性塑料，橡胶或其他沥青成分安装，维修或更换单层屋面系统。

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Two-ply refers to materials that twist two threads together into a single thread, thus increasing the fabric's thread count and creating a stronger thread.

两层材料，是指两个线程一起扭成一个单一线程，从而增加了织物的线程数和创造一个更强有力的线程。

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