求翻译：合同履行完毕时，乙方需返还甲方提供全部设计方案及文件（包括但不限于原稿、修改稿、纸质文件），电子文件及电子邮件应立即删除；;是什么意思？

The performance of the contract, Party B is required to return the Party to provide all design and documentation (including but not limited to the original, revised, paper documents), electronic documents and e-mail should delete it immediately;;

Contract when you are finished, Party B to party a return with a full design and documentation (including, but not limited to, the original script, modified paper) and electronic files and e-mail should be removed immediately;

When the contract fulfillment finished, (but the second party must return the party of the first part to provide the completely design proposal and the document including is not restricted in original manuscript, revises manuscript, paper document), the electronic document and the email should delet

Upon completion of contract performance, programme of party b is required to return the party to provide full design and documentation (including, but not limited to original, revised, paper file), electronic documents and e-mail should be immediately deleted;;

正在翻译，请等待...