Inspecting fitting accuracy of hatch coaming on board.
货舱口围板船上安装精度检查。
2
Support for the 'cross hatch' board solving technique.
支持为越过舱口'董事会解决技术。
3
Translation of the hatch under the protection board, nursing board's interpretation under the hatch , the hatch under the guard plate means English, Chinese, English …