The rules apply principally to the structural strength of the hull and the reliability of its essential machinery and equipment.
该规则适用于主要是对船体结构强度和它的基本机械和设备的可靠性。
The rules apply principally to the structural strength of the hull and the reliability of its essential machinery and equipment.
该规则适用于主要是对船体结构强度和它的基本机械和设备的可靠性。
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