标 准 编 号：MSS SP-121-2006 简体中文标题：开降式阀杆(明杆)钢制阀门柔性石墨填料的鉴定试验法繁体中文标题：开降式阀杆(明杆)钢制阀门柔性石墨填料的鉴定试验法English Name：qualification testing methods for stem packing for rising stem steel valves
