外贸信用证一句话翻译Buyer’s Bank within FIVE(5) working days issue Ope

外贸信用证一句话翻译
Buyer’s Bank within FIVE(5) working days issue Operative, Divisible, and Irrevocable Revolving LC/SBLC SWIFT to Seller’s nominated Bank in favor of the Seller and seller confirm instrument through his bank. The Sellershall be able to draw upon the LC/SBLC up to 6% of the valueof the LC/SBLC.
请问最后一句的draw upondraw upon the LC/SBLC什么意思？