燃?xì)鈱Ｓ媒刂归y北京高科恒通閥門(mén)專業(yè)生產(chǎn)燃?xì)鈱Ｓ媒刂归y,法蘭燃?xì)鈱Ｓ媒刂归y,鑄鋼燃?xì)鈱Ｓ媒刂归y,不銹鋼燃?xì)鈱Ｓ媒刂归y,J41N燃?xì)鈱Ｓ媒刂归y燃?xì)鈱Ｓ媒刂归y采用成形聚四氟乙烯/柔性石墨作為密封填料，由填料壓蓋提供