信用证金额 amount of credit
信用证余额||信用证结欠 credit balance
开立信用证 to open a credit
通过银行开立信用证 to establish a credit through a bank
电开信用证 to cable a credit
取消信用证 to cancel a credit
开出信用证 to issue a credit
在某银行开立信用证 to arrange a credit with a bank
修改信用证 to amend a credit
延展信用证有效期 to extend a credit
