单词	sand and gravel dredger
释义	sand and gravel dredger 砂石挖掘船
随便看	hydrogenation pyrolysis hydrogenation reaction hydrogenation reaction cauldron hydrogenation reaction chambbr hydrogenation reaction chamber Hydrogenation reaction vessel hydrogenation reactor hydrogenation reactor in service Hydrogenation reactor of pyrolysis gasoline Hydrogenation reactors hydrogenation reduction hydrogenation refining hydrogenation refining catalyst hydrogenation reforming hydrogenation residues hydrogenation rosin hydrogenations hydrogenation, selective hydrogenation sites hydrogenation solvent hydrogenations refinery hydro-genation stability hydrogenation still hydrogenation straight shell ring hydrogenation tail oil