求翻译：　　我单位保证遵守《中华人民共和国海关法》及国家有关法规保证所提供的单位与所报的货物相符，如申报货物有任何问题，责任由我单位承担。本委托书有效期至是什么意思？

My unit to ensure compliance with the Customs Law of the People's Republic of China and the relevant state laws and regulations to ensure that the units consistent with the quoted goods, such as to declare that the goods have any questions, the responsibility borne by my unit. This power of attorney

I guarantee that in compliance with the customs law of the People's Republic and national laws guaranteeing the units and the conformity of the goods, such as declaration there are any questions I am units. This proxy is valid until

　　My unit guaranteed observes "the People's Republic of China Customs Law" and the national related laws and regulations guaranteed provides the unit with the cargo match case which reports, if the declaration cargo has any question, the responsibility undertakes by my unit.This warrant term of vali

　　I units to ensure compliance with the People's Republic of China Customs law and relevant regulations of the State guarantee of the goods provided by the unit and the line, such as Declaration of goods with any problems, the responsibility borne by my unit. This power of Attorney is valid until

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