(20#)同心缩渐管CON aged
(304)同心缩渐管CON aged
(304L)同心缩渐管CON aged
(316L)同心缩渐管CON aged
(20#)偏心缩渐管Ecc aged
(304)偏心缩渐管Ecc aged
(304L)偏心缩渐管Ecc aged
(316L)偏心缩渐管Ecc aged
