issue date ,on board date

issue date ,on board date shipment date ,B/L date,on board date 区别 “issue date" on board date和 date of shipment各是什么意思? SHIPPED ON BOARD DATE翻译成英语 请问 Issue Date 和 Due Date, 信用证问题信用证条款:SHIPPED ON BOARD DATE/ACTUAL DATE OF DISPATCH BEA 请问一下shipment date ,on board date 有什么区别呢? date DATE OF ISSUE:29SEP10是什么意思 TICKET ISSUE DATE 19Aug09是什么意思 DATE OF ISSUE :Emb.of Afghanistan Beijing