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Dredging features of common dredgers and selection type .

常见挖泥船疏浚特性及选型。

Buy tugs , dredgers and navigation vessels .

巴基斯坦商人求购拖船、挖泥船和导航船。

Every day , dredgers dug worth 30000 u. s. dollars to gold , and mine never pay a penny to the state .

每天，挖泥船能挖到价值3万美金的黄金，而矿主却从未向国家交过一分钱。

Repairing technical requirement for special equipment of cutter suction dredgers part 3 : suction ladder .

绞吸挖泥船专用设备修理技术要求第3部分:绞刀架。

Application of cutter-suction dredgers to river dredging on the lower yellow river .

绞吸式挖泥船在黄河下游挖河疏浚中的应用。