71A2000000 Expanded PTFE sheet
11A1000000 纯聚四氟乙烯填料，无润滑剂
42A2000000 Expanded PTFE sealing tape with adhesive backer
11A1H19000 膨体聚四氟乙烯和聚四氟乙烯芳纶斑马填料
11B3F14000 玻璃纤维增强膨胀石墨填料
