英语翻译还有40% upon loading start to barge10%upon completed loaded on MVessel怎么翻译,那个pra到底是什么东西?

英语翻译还有40% upon loading start to barge10%upon completed loaded on MVessel怎么翻译,那个pra到底是什么东西?
英语翻译
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40% upon loading start to barge
10%upon completed loaded on MVessel怎么翻译,那个pra到底是什么东西?

英语翻译还有40% upon loading start to barge10%upon completed loaded on MVessel怎么翻译,那个pra到底是什么东西?
50% upon signing the contract and after pra shipment应该是：签订合同时付款50%,发货后付完余款.这个pra很难理解,最好问下发邮件的人,确保付款万无一失.
40% upon loading start to barge
10%upon completed loaded on MVessel应该是：货物开始装船时付款40%；装船后追加10%的付款.

40%在加载时启动驳船完成后的 10 %mvessel 上加载