Key slot : connection between plug and receptacle is positioned by 5 key slot s, That is before contact is connected, shell should be positioned in order to avoid damaging contact during mating.

• 键5：插头与插座的连接采用五键5定位，即在接触件连接之前，壳体先定位，可避免壳体在对接过程中损伤接触件。