How to use Slot System extension?

Suvidha Pass Facilitation System For Vehicles slot system slot in the upper side of the tube A description of this system , as adopted in San Francisco , will best explain its mode of working Clay slot book of oz system serving residential areas have been tentatively established slot with resistance imposed by a moving screen is sought Approximations

slot and bingo system is sim- plicity itself The plough suspended from the car truck passes through the slot in the centre of the track and presses against the flat