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| There is some evidence that a slot of about 30 cm wide and about 50 cm deep was dug in a straight line on both sides of a stepped structure called “main terrace” at the “upper terrace” of the upper part of the ruins point. The tip of this slot is connected with the drain. It can be thought that it descends in a staircase pattern toward the end of the west in the sea knoll and it exists toward the low ground at the south side across a passage after wrapping around to the north side. | |