标 准 编 号：MSS SP-120-2006 简体中文标题：升降式阀杆（明杆）钢制阀门柔性石墨填料系统的设计要求繁体中文标题：升降式阀杆（明杆）钢制阀门柔性石墨填料系统的设计要求English Name：Flexible Graphite Packing System for Rising Stem Steel Valves - Design Requirements
