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[plug can be easily pull out and pick up after pressing the socket]
Unlike the normal extension lead needs to hold down the bottom and pull the plug out.
The new design helps us pick up the plug easier by using lever rule.
There is a spring inside the socket which can help it to restore it's position.
The button adopt the H-Beam design which is solid and not damaged easily,
also can avoid something accidentally drop inside the socket.
Far East University Library