systemsecurity20whatisdigitalsignatureandsigntool
date of signature: 甲方: 签约日期: seller: 乙方: this purchase
老师给的note都是pdf 所以用ipad是相当方便的 只需要insert
pensigner insert signatures or hand drawn graphics into the
即pdfsignature 和 pdfordinarysignaturemaker类
Tips:Do Not Provide
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