docking girder是什么意思

用法例句

However the current rules for naval ships in China are not applicable to docking strength check for the ships longer than 160m.

墩木的合理布置对保证大型水面舰船在船坞建造和进出坞过程中的安全至关重要,而国内现有舰船规范不适用于船长大于160m的舰船的坐坞强度校核。