hatch h box 检查箱
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In this paper, minimum weight design of a hatch cover of box cross section is made by geometric programming. The analytic optimal solution is obtained.
本文采用几何规划方法对船舶的箱形剖面舱口盖进行最小重量设计，求得了解析的最优解。
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Sealed radio box hatch can be attached or removed with one screw.
舱口密封广播中可以附加或删除一个螺钉。
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模块上移
模块下移
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