He mea hanga ngā whitiki me ngā tīwiri o te rawhi paipa pakari kia kaha te whakau, ā, he kaha hoki te taipana. Nō reira, he momo rawhi kaha te rawhi paipa pakari, ā, he whānuitia ngā whakamahinga. Ko te tauira o ēnei rā e whakamahia ana i runga i te paipa uaua mīti kau 4-inihi. , ka taea e ngā rawhi kaha ā-Pākehā te rawhi kaha i ngā paipa, ka taea te rawhi kaha i ngā paipa, ā, kāore e ngāwari te taka i muri i te rawhi, nō reira me pēhea te whiriwhiri i ngā whakaritenga o ngā rawhi kaha ā-Pākehā? Me pēhea te tāuta? Ko ngā tikanga e whai ake nei: 1. Ine i te diameter o te paipa: mā te ine i te diameter o te paipa anake ka taea te whiriwhiri i te rahi o te rawhi kaha ā-Pākehā.

I te ine, ko te uara rahi nui ko te diameter o te paipa. E ai ki te tauira o te pikitia, ko te diameter o te paipa i inehia he 118mm, he paipa 4-inihi. Ka haere tātou ki te ripanga whakatakotoranga rawhi Pākehā hei whiriwhiri i te whakatakotoranga e rite ana, kei reira te rahi A o 113-121, nā te mea kei roto te 118mm, ā, i muri i te whakakakahu i te rawhi āhua Pākehā o tēnei rahi, kua tika, nō reira whiriwhiria te rahi o 113-121.

2. Tikanga Tāutanga: I mua i te tāutanga o te paipa, me whakatakoto tuatahi te rawhi kaha ā-Pākehā, kātahi ka whakauru i te paipa ki te tawhiti rawa atu, kia pai ake ai te maha o ngā hononga i waenga i te paipa me te paipa rino. Nekehia te rawhi kaha ā-Pākehā ki waenganui o te hononga o te ngongo uaua mīti kau me te ngongo rino, ka whakakī mā te kī, mā ētahi atu taputapu rānei. 3. Tirotiro i muri i te tāutanga I ētahi wā ka whakaaro tātou kua whakakīia, engari i ētahi wā ka tāutahia te rawhi ā-Pākehā ki te taha whakarara, ā, he kaha ina mau, engari ina nekehia te ngongo.