Singleply embossing, double ply embossing, steel to steel embossing.
单压花，双面压花，钢对钢压花。
2
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。
3
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.