Surface finish Analysis of the corresponding relationship between surface finish and roughness from ▽1 to ▽14 and their processing applications This article focuses on the corresponding relationship and application between surface finish and surface roughness... Surface roughnessLow to medium accuracy range Influence of post - vulcanization time and small - molecule migration on the properties of NBR materials and corresponding countermeasures This paper conducts research centered around nitrile butadiene rubber (NBR)... Concentration gradient and energy differenceThe post-vulcanization time is prolonged