L/C 和L/C AT SIGHT 的区别主要是什么啊?

T/T, L/C at sight 的 at sight 是什么意思? L/C 和L/C AT SIGHT 的区别主要是什么啊?as the subject L/C 和L/C AT SIGHT 的区别主要是什么啊? By irrevocable L/C at sight,provisional:98%,final:2% L/C at sight or T/T in advance draft at :sight in duplicate indicating this L/C number? 请问 付款方面,20% L/C AT SIGHT,75% D/P AT SIGHT 怎么翻译, Irr.L/C at sight的意思?是不可撤销即期信用证的意思吗? Irr.L/C at sight的意思?是不可撤销即期信用证的意思吗? D/P at sight与T/T与T/C的利与弊是什么?不好意思,是L/C relevant sight L/C in our 外贸词解释30%的DEPOSITES BY T/T,T/T+AT SIGHT L/C,THE LEFT 70% PAY BY AT SIGHT L/C这些外贸句子是什么意思?大家帮忙了... we require payments by a confirmed irrevocable L/c payable draft at sight.这是外贸的一种付款方式 懂英语的翻译一下：Irrevocable L/C at sight in favor of us OR T/T in advance 30% Deposit by T/T,the balance paid by L/C at sight可以有这样的付款方式吗?客户同意L/C at sight,我又加上30% Deposit by T/T这样有必要吗?比L/C at sight更好吗?CI,PL是什么？ 英语翻译irrevocable confirmed L/C payable at sight Despatched within 45 days of receiving LC open by irrevocable L/C at sight in favor of 公司名字 请翻译下“ Terms of payment:%100 Irrevocable L/C at sight”