approach signal进: advance; move forward; move ...港: harbour; port信号: signal; semaphore; gun进港与离港信号: entering and leaving signal进出港信号: entering and leaving signals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:进港信号，即可在微信中查询翻译
