标 准 编 号:ASME B16.33-2002 简体中文标题:125表压及以下的气体管道系统用手动金属气阀(尺寸NPS 0.5~2) 繁体中文标题:125表压及以下的气体管道系统用手动金属气阀(尺寸NPS 0.5~2) English Name:Manually operated metallic gas valves for use in gas piping systems up to 125 psig (sizes NPS 1/2 through NPS 2)