光票信用证 meaning in English

clean credit （clean l/c）
clean letter of credit (clean l/c)
crédit sans documents

We open our irrevocable clean credit up to an aggregate amount of sf 1 , 200
我开出不可撤消光票信用证，金额总数为1200瑞士法郎。
Clean credit is generally used in non - trade settlement , and documentary credits are mostly used in international trade
光票信用证主要用于非贸易结算，而在商品贸易中一般使用跟单信用证。
Clean letters of credit are mainly used in non - trade settlement , while documentary credits are generally used in commodity trade
光票信用证主要用于非贸易结算，而在商品贸易中一般使用跟单信用证付款。
Chapter i makes detailed delineation of the definition and characters of the standbys with its focus on the comparison between several concepts : standby vs . clean l / c , standby vs . commercial documentary l / c , standby vs . surety and standby vs . banker ' s guarantee . based on the comparison , i give prominence to the nature of the standbys , thus laying foundation for the two chapters thereafter
本文第一章对备用证的定义和性质进行了详细介绍，重点比较了备用证与光票信用证、商业跟单信用证、保证和银行保函的异同，澄清了容易混淆的几组概念，突出了备用证的特点，为后两章的规则比较打下了基础。