英语翻译

题目

英语翻译
the buyers shall issue an irrevocable l/c at __sight through bank of china in favor of the sellers prior to may30,2007 indicating l/c shall be valid in china through negotiation within 15 days after the shipment effected,the l/c must mention the p/o no,

答案

买方需在2007年5月30日前通过中行开立以卖方为受益人的即期不可撤消信用证, 该证在中国到期出运后15天内议付并注明定单号码.