不锈钢BA管

冷轧 l cold rolled l 光亮退火 l Bright annealed l 内壁粗超度均匀，粗糙度在0.45um 左右 l Uniform wall roughness,roughness around the 0.45um l 英制国标规格居多，公差范围小， 内外表面干净 l British and national standard specification,tight tolerances,inside and outside surfaces cleaning