T/T payment after fay receipt of copy B/L 这样的付款方式安全吗

T/T payment after fay receipt of copy B/L 这样的付款方式安全吗 T/T after shipment of goods and against receipt copy B/L by .100% T/T AFTER SHIPMENT AND ON RECEIPT THE COPY B/L AND ON T/T AFTER SHIPMENT AGAINST RECEIPT COPY T/T at sight B/L copy请问是什么付款方式,风险大不大呢? FIRST PAYMENT 10%T/T,the balance against the copy of the b/l T/T payment against the copy of B/L in one time after receipt of payment表示的是在收到货款后,还是看到付款凭证（水单）后. 付款方式“T/T against B/L date” T/T payment 30 days after B/L date 和 T/T30天是一个意思吗? 付款方式T/T, Delivery:within 45days on receipt of T/T 40% payment and bal