根据以下信用证条款，回答相关问题。 Applicant：Nissho 1wai Corporation No．4-5 Akaasaka 2-Chome Mi—Natou Tokyo，Japan Bneficiary：China National Mine Import and Export Corp．Beijing，P．R．China Pre-advice：Bank of China，Beijing Branch Documents required：Full set of clean on board marine bills of lading made out to order and blank endorsed ，marked “freight prepaid”. 该提单属于哪一种类