L/C at sight or T/T in advance 是什么意思?

L/C at sight 即期信用证
L/C: Letter of Credit 信用证

T/T in advance 预先电汇现金
T/T : Telegraphic Transfer 电汇现金

L/C at sight or T/T in advance 付款方式为即期信用证或者预先电汇现金（一般说出货前付款）

L/C at sight 即期信用证 L/C: Letter of Credit 信用证T/T in advance 预先电汇现金T/T : Telegraphic Transfer 电汇现金
就是说提供即期信用证再发货或者电汇后再发货。