Ko te kawe UC e tohu ana ki te kawe porowhita o waho.
Ko te whanau poroi porohita o waho he momo rerekee o te whao poroporo hohonu, e tohuhia ana e te mata diameter o waho o te mowhiti o waho he porowhita, ka taea te whakauru ki roto i te porowhita concave e rite ana o te nohoanga e mau ana ki te takaro i a koe ano- whakahāngai.