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2. Whakaotihia: Ko te otinga o te ngongo kaore noa i te ahua ataahua engari ka whakarei ano hoki i te ātete, ka whakakaha, ka roimata.
3. Hoahoa Maamaa: Ko te hoahoa maama o te ngongo cylinder he mea ngawari ki te whakahaere, te kawe, me te whakauru.
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