bucket ladder dredge

释义

多斗式挖泥船；

ENDLESS BUCKET DREDGE WITH ARTICULATED LADDER AND SWELL COMPENSATOR
Dynamic analysis of a semisubmersible-type bucket-ladder dredge /
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Environmental benefits of the bucket ladder dredge
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Buckets of gold a conference to commemorate the New Zealand invention of the bucket ladder Gold Dredge
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