heavy deck
重型甲板
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重型甲板船 heavy deck vessel
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机械装臵、带缆桩、艇吊和其它重型负载集中区域下方的甲板应采用短纵桁或复板进行加强，具体应经过船级社认可。
Decks under machinery, bollards, boat davit and other heavy concentrated loads to be reinforced by carling or welded doubler where necessary as approved by Class.
youdao
在上层甲板上还有数门重型大炮。
And also there were heavy cannons on upper deck.
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