久久亚洲中字幕在线,五月天台湾亚洲精品,日本欧美一区二区在线观看,色婷婷婷一区二区三区,亚洲美女久久久久久久,婷婷丁香69五月天,国内伦精品一区二区,婷婷在线中文字幕日韩,欧美又大粗又爽又黄大片视频

  NQB1 and NQB2 inherited the advantages of QB1 and QB2 as wellas added other advanced  use function of electric actuators.They are always used in ball vavle ,butterfly valve ,plug valve and other 90?_turn valves.NQB1 and NQB2 seris valve electric actuators are wildly used in petrochemicai,matallurgy,energy sources ,municipal ,light industry ,food and other fpipeline aontrol system. QBR 3 to 5 ,torque rang are from 900 to 12000NM,were developed by our company.The electric actuators, combination of these seris and butterfly valve,were used to control the open and close of valve