double bottom

英美

释义
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- 双半挂车,双层船底
临近单词

double rig double double isotope dilution analysis double end tungsten halogen lamp double offset expansion U-bend double-properties turbine disk double-signal telegraph keying double-layer cylindrical shell double eccentric butterfly valve double-lumen endotracheal tube double antibody radioimmunoassay double tube tunneling excavation

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