求翻译：近日，哈尔滨海关、大连海关、呼和浩特海关、满洲里海关、沈阳海关、长春海关共同签署了《东北及内蒙古地区海关合作协议》。协议签署后，我市进出口企业可在东北三省及内蒙古实现异地通关，且在四省区内中转的进出口货品只需一次检验，可为东北地区进出口企业简化通关手续。是什么意思？

Recently the Customs Harbin, Dalian Customs, Customs Hohhot, Manzhouli Customs, Customs Shenyang, Changchun Customs signed a customs cooperation agreement for the Northeast and Inner Mongolia. After signing the agreement, the city's import and export enterprises in the three northeastern provinces a

Recently, Harbin, Dalian customs, Customs and Excise Department, Customs and Excise Department huhhot, Manchuria, northeast China Customs, Customs and Excise Customs and Excise Department Changchun has co-signed the north-east and Inner Mongolia region customs cooperation agreement. After signing th

Recently, Harbin, Dalian customs customs, manzhouli customs, Hohhot, Shenyang, Changchun customs jointly signed the agreement on customs cooperation in the Northeast and Inner Mongolia region. After signing the agreement, the city's import-export business may be achieved in the three provinces in No