换文 meaning in English

exchange of notes [letters]: 就发展贸易关系换文 exchange notes on the development of trade

Exchange note for reciprocal exemption of tax on shipping income ?
互免海运企业运输收入税收换文； ?
Till now , china has already exchanged notes with 26 countries on 58 schools
目前，中方已与非洲26国办理了58所学校的立项换文。
Letter of exchanges regarding regulatory co - operation for mainland companies to be listed on gem
有关创业板内地发行人监管合作事宜之换文
Article 13 additional protocols , additional articles , signed protocols , exchanges of notes or letters , agreed minutes , or appendices of treaties or agreements are also part of treaties or agreements , and shall be treated equally
第13条条约或协定之附加议定书、附加条款、签字议定书、解释换文、同意纪录或附录等文件，均属构成条约或协定之一部分，应予并同处置。
After the aforesaid competent authorities serves the official copy of an exchange of letters or notes to the other signatory , the copy shall be photocopied , with a note stating “ this copy is the same as the official signed copy ” , and sent , together with the official copy signed by the other signatory , to the ministry of foreign affairs for deposit
前项主办机关致送对方签约国之换文正本，应于签署后摄制影印本并注明本件与签字正本无异后，连同我方之签字正本，于三十日内送外交部保存。