Kei te Tāone o Zhongshan, Porowini o Guangdong, tētahi o ngā tāone matua o te Pearl River Delta, e hipoki ana i tētahi rohe neke atu i te 10000 mita tapawha, he kamupene hanga wira me ngā wira hei whakarato i te whānuitanga o ngā rahi, ngā momo me ngā momo hua ki ngā kiritaki mō ngā momo tono. Ko te kamupene i mua ko BiaoShun Hardware Factory, i whakatūria i te tau 2008, ā, he 15 tau te roa o te wheako hanga me te hanga ngaio.
Ka taea e te mata wira rapa ngohengohe o ngā wira rapa matua rino te tiaki pai i te whenua. Ka taea e te mata wira rapa ngohengohe te mimiti i te pānga o ngā mea e neke ana. He marino, ā, he whānui te whakamahinga i ngā wā maha. He peera roera te peera roera ngira me ngā roera porotaka. Ko te roa o te roera he 3~10 ngā wā o te whānui, ā, ko te whānui he 5 mm te nuinga. He teitei te pai o te tuku. Ko te tauwehenga waku he 0.001-0.005 noa iho;
1. He ātete kume tino pai, he kaha kume teitei hoki.
2. He kaha pai tōna ki te pupuri.
3. He pai te ārai hiko, te ātete ki te paheke, te ātete ki te kakahu, te ātete ki te huarere me ngā matū whānui.
4. Ka taea e te kakano ngohengohe te whakaiti i te haruru i te whakamahinga.
5. Ngā āhuatanga miihini hihiri pai.
6. He tino pai te mahi ā-mīhini o te peera hurihuri, ā, he roa te ora ratonga.
7. Nā te mea he pai te tuku o te peera hurihuri, he iti hoki te putanga wera, ka taea te whakaiti i te whakamahinga o te hinu whakahinuhinu, ā, he watea ake te whakahinuhinu me te tiaki.
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| Te Diameter o te Wira | Utaina | Toki | Āwhata | Utaina | Rahi o te pereti o runga | Te Mokowā o te Pūwero | Te Diameter o te Pūwero | Te whakatuwheratanga | Tau Hua |
| 80*30 | 80 | 38 | 2.5|2.5 | 108 | 105*80 | 80*60 | 11*9 | 42 | R1-080S-604 |
| 100*30 | 120 | 38 | 2.5|2.5 | 128 | 105*80 | 80*60 | 11*9 | 42 | R1-100S-604 |
| 125*37.5 | 150 | 38 | 2.5|2.5 | 155 | 105*80 | 80*60 | 11*9 | 52 | R1-125S-604 |
| 160*40 | 200 | 52 | 3.0|3.5 | 190 | 135*110 | 105*80 | 13.5*11 | 62 | R1-160S-604 |
| 200*50 | 230 | 54 | 3.0|3.5 | 235 | 135*110 | 105*80 | 13.5*11 | 62 | R1-200S-604 |