Kei te Tāone o Zhongshan, Porowini o Guangdong, te kamupene Zhongshan Rizda Castor Manufacturing Co., Ltd., tētahi o ngā tāone matua o te Pearl River Delta, e kapi ana i te rohe neke atu i te 10000 mita tapawha. He kamupene hanga wira me ngā wira hurihuri ngaio hei whakarato i te whānuitanga o ngā rahi, ngā momo me ngā momo hua ki ngā kiritaki mō ngā momo tono. Ko te kamupene o mua ko BiaoShun Hardware Factory, i whakatūria i te tau 2008, ā, he 15 tau te roa o te wheako ki te hanga me te hanga ngaio.
He māmā te taumaha o ngā wira nairona, he iti te ātete ā-mīhini, he ngāwari te hurihanga, ā, he iti ake te mahi ina whakamahia ā-ringa, ā-mīhini hoki. He pai hoki mō te mahi i roto i te taiao mākū, ā, he āhuatanga ārai-hinu me te ārai-waikawa, ā, he rauemi tiaki taiao anō hoki. He wira wira 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 kāore e neke ake i te 5 mm. He teitei te pai o te tuku. Ko te tauwehenga waku he 0.001-0.005 noa iho;
1. He ātete wera pai: ko tōna pāmahana whakarerekētanga wera he 80-100 ℃.
2. He pakari pai, he ātete matū hoki.
3. Kāore he paitini, kāore he kakara, he rauemi e pai ana mō te taiao, ka taea te hangarua.
4. Ātete ki te waikura, te ātete waikawa, te ātete kawakore me ētahi atu āhuatanga. He iti noa te pānga o ngā pūnga waro noa pēnei i te waikawa me te kawakore ki a ia.
5. He pakari, he pakari hoki, ā, he ātete ki te ngenge me te pakaru i te ahotea, kāore tana mahi e pāngia e te haumākū o te taiao; he roa te ora piko me te ngenge.
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*36 | 120 | / | 2.5 | 108 | 105*80 | 80*60 | 11*9 | 42 | R1-080R-304 |
| 100*36 | 150 | / | 2.5 | 128 | 105*80 | 80*60 | 11*9 | 42 | R1-100R-304 |
| 125*36 | 160 | / | 2.5 | 155 | 105*80 | 80*60 | 11*9 | 52 | R1-125R-304 |
| 125*40 | 180 | / | 2.5 | 155 | 105*80 | 80*60 | 11*9 | 52 | R1-125R-3042 |