清洁提单指运输公司签署表明货物在收到时外表状况良好没有货物损坏或包装不良情况的提单
A clean bill of lading is a bill of lading signed by the shipping company indicating that the goods were in good apparent condition at the time of receipt and that the goods were not damaged or poorly packed
以上为机器翻译结果，长、整句建议使用 人工翻译 。