The wellhead cover opening and closing device according to the underwater maintenance and inspection equipment

• 1. 打开和关闭装置，制造打开和关闭装置以及具有这种打开和关闭装置的包装容器的方法 [P] . 中国专利： CN106660678B . 2020.03.13
• 2. 打开和关闭装置，制造打开和关闭装置以及具有这种打开和关闭装置的包装容器的方法 [P] . 中国专利： CN106660678A . 2017-05-10
• 3. The wellhead cover opening and closing device according to the underwater maintenance and inspection equipment [P] . 日本专利： JPH0613897Y2 . 1994-04-13

  机译： 根据水下维护和检查设备的井口盖打开和关闭装置

• 4. Underwater paint inspection method, underwater paint inspection equipment, underwater work methods and underwater working device [P] . 日本专利： JP2012213728A5 . 2013-08-15

  机译： 水下涂料检查方法，水下涂料检查设备，水下作业方法和水下作业装置

• 5. The fitting detachment device of underwater maintenance and inspection equipment [P] . 日本专利： JPH077277Y2 . 1995-02-22

  机译： 水下检修设备的配件拆卸装置

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