What does 已出口直封 mean? My first question here, sorry if it's not a good fit.

I am tracking a parcel in Chinese, but I do not know what 已出口直封 means.

I know that 广州互换局 means Guangzhou exchange bureau/office, and 已出口开拆 means that the parcel has been opened by customs, but I don't know the other part.

For context:


  2016-04-10 13:03 广州互换局, 已出口直封
  
  2016-04-10 09:13 广州互换局, 已出口开拆


I have checked Google Translate, but it just says straight seal, which is meaningless to me.

Translated.net also says We have been exported straight seal. I have no idea what this means though.
I guess this should mean the inspection was successful and your package is directly(直)  (re)packaged(封)

According to http://community.ebay.cn/thread-1200132963-1-1.html (this is the most helpful page I have found)
A translation is "departure from outward office of exchange". A Chinese explanation is "这表示包裹己经顺利的通过海关检查,重新打包好,交给航空公司,等待航班飞走", it means "this indicates the package passed the inspection by custom and had been repackaged, sent to airline and waiting the plane to fly"