closed connected bucket chain
... bucket chain dredge 链斗式挖泥船 closed connected bucket chain 连续斗链 bucket chain dredger 链斗式挖泥机 ; 多斗挖掘船 ; 链斗挖泥船 ...
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短语
连续戽斗链采矿
continuous line bucket system
连续链斗采矿系统
continuous line bucket mining system
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