航空挂号邮件 meaning in Chinese

registered air mail (ram)

Would you please let us know the additional costs for insurance and transport of the goods ， if you sent them by registered airmail
若以航空挂号邮件寄送此货品时，请告知保险费及运费的追加金额。
Both parties shall attempt to get the contract approval within 60 days from signing and notify by telex or cable the other party of the approval which is confirmed by the following registered air - mail letter
双方应尽力在合同签署后60日内获得批准并以电传或电报形式通知该批准，随后以航空挂号邮件确认。