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 refers to a bill of lading signed by a transportation company indicating that the goods are in good physical condition upon receipt, without any damage or poor packaging
以上为机器翻译结果，长、整句建议使用 人工翻译 。