外胶层 ：黑色、红色、黄色、蓝色等光面或布纹面合成橡胶。
Cover: EPDM / SBR blended, black, red, yellow and blue, weather and ozone resistant. smooth or wrapped surface.
布纹纸：造纸时，水印辘用平坦的织物包面，纸面于是无压线纹理，有别于纹纸。
Wove paper: paper produced Using a plain, woven dandy roll and there fore without laid lines, as distinct from laid paper.
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