他行使了购买独家销售该产品权利的选择权。请尽量延长有效期。
He exercise his option or he take up his option to acquire sole marketing rights to the product.
借款方应充分了解，除非信用证 开出后延长有效期 日期，信用证不可以现金方式撤回或退还。
The Borrower fully understood that the L/C could not be withdrawn or refundable for cash other than extension of validity dates after the L/C has being issued.
因此，您还需要延长主服务器、故障转移服务器和代理的 X.509 证书的有效期。
Therefore you also need to renew the X.509 certificates for the primary server, the failover servers, and the agents.
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