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？

50% deposit,balance by T/T before shipment 请问100%T/T ,70%deposit and 30%balance 30% deposit with order by T/T,balance against copy of BOL 请帮我翻一下,谢谢 By 30% deposit once order confirmed,the balance 70% T/T against the copy of B/L.”“Please change t翻译.By 30% deposit once order confirmed,the balance 70% T/T against the copy of B/L.”“Please change to 30% down-payment instead of saying depo 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？ T/T 30% deposit in advance,the balance against BL copy 15 Days PDC 15 Days AMS 15 DAYS T/TDeposit In Advance T/T IN ADVANCE C.O.D.T/T Half In Advance 30% deposit in advance15 Days PDC 15 Days AMS15 DAYS T/T 英语外贸合同1：30% of the contract value should be paid as deposit by T/T ,the 70% balance should be paid before delivery by T/T.2：Quality Warranty:the warranty of the contract goods should be according to the Manufacturer3：The Agreement s t-ara day by t-ara day by T T “T “T T T/T against fax shipping document without deposit*,or *L/C at sight*.急用. median deposit The median deposit consists of 17.2mt grading 3.32g/t and contains1.8moz. 30%T/T in advance as deposit,and 70% balance upon delivery.另外后半句是 balance 30 days from b/l date 啥意思?