短語詞組短語pressure controlled safety valve 壓力控制安全閥pressure relief safety valve 泄壓安全閥closing pressure of safety valve 安全閥的複位壓力set pressure for safety valve 安全閥的調(diào)定壓力high pressure wellhead safety valve 高壓井口安全閥opening pressure of safety valve 安全閥開啓壓力;安全門開啓壓力blowdown pressure of safety valve 安全閥關(guān)閉壓力return pressure of safety valve 安全閥廻座壓力Pressure e safety valve PSV 安全閥 返回 pressure safety valve