阀门

• Industrial valves . steel ball valves . specifications
  工业阀门.钢制球阀.规范
• Safety relief valves for anhydrous ammonia and lp - gas
  无水液体石油气用安全卸荷阀门
• Dimension a , center of valve port to floor level
  尺寸a ,阀门端口中心至地面的距离。
• Rubber products - shock absorber , rubber vavle
  橡胶制品-减震垫橡胶阀门风道补偿器
• Valves supplied with hammerblow handwheel as a standard
  锤击手轮是阀门的标准配置。
• Valves - terminology - definition of types of valves
  阀门.术语.阀门类型定义