lower gate bay船闸: navigation lock; ship lock; ...下: below; down; under; undernea ...首: head下闸首: lower head下闸首墩: lower gate block下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:船闸下闸首，即可在微信中查询翻译
