（）is a document granted by the customs authorities which allows a vessel tostart unloading goods.
A、EntryInwardsA
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Afoulbillofladingmeansthatthebillofladingisverydirty.
Shipperisthepersonwhohasconcludedacontractwiththecarrierforcarriageof.
Acleanbillofladingmeansthatthebillofladingisveryclean.
Accordingtodocumentarycredit,the____,onreceiptofletterofcredit,willhavetoprepareshipmentofthecontractgoodswithinthedeliverydate.
Themarinecargoinsurancepremiumratesmayvarydependingonfactorssuchas（）.
