工(gong)(gong)業(ye)(ye)以太(tai)網(wang)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)與普通(tong)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)相比的(de)(de)優勢在(zai)(zai)于(yu)，性(xing)能(neng)上(shang)并沒(mei)有(you)太(tai)大的(de)(de)區(qu)別。從網(wang)絡層(ceng)級(ji)上(shang)看，它(ta)們都有(you)二(er)層(ceng)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)和三層(ceng)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)。但工(gong)(gong)業(ye)(ye)以太(tai)網(wang)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)在(zai)(zai)產品(pin)設計和元器(qi)件(jian)選(xuan)取上(shang)更(geng)講(jiang)究，它(ta)更(geng)適(shi)應于(yu)工(gong)(gong)業(ye)(ye)現(xian)場的(de)(de)使用(yong)需求。在(zai)(zai)機(ji)(ji)(ji)(ji)械、氣(qi)候(hou)和電磁(ci)等(deng)惡(e)劣(lie)環境(jing)下，工(gong)(gong)業(ye)(ye)以太(tai)網(wang)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)仍然能(neng)夠正常工(gong)(gong)作。因(yin)此(ci)，它(ta)在(zai)(zai)條件(jian)較(jiao)為惡(e)劣(lie)的(de)(de)工(gong)(gong)業(ye)(ye)生產場景(jing)中(zhong)得到了(le)(le)廣泛應用(yong)。工(gong)(gong)業(ye)(ye)以太(tai)網(wang)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)采用(yong)存儲轉發交(jiao)換(huan)(huan)(huan)方式，提高以太(tai)網(wang)通(tong)信速度，并內置智(zhi)能(neng)報警功(gong)(gong)能(neng)。它(ta)能(neng)夠監(jian)控網(wang)絡運(yun)行狀(zhuang)況(kuang)，確保(bao)以太(tai)網(wang)在(zai)(zai)惡(e)劣(lie)危(wei)險的(de)(de)工(gong)(gong)業(ye)(ye)環境(jing)中(zhong)可(ke)靠穩(wen)定(ding)地運(yun)行。這就導致了(le)(le)工(gong)(gong)業(ye)(ye)級(ji)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)在(zai)(zai)價格上(shang)要(yao)(yao)比商(shang)業(ye)(ye)級(ji)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)更(geng)昂(ang)貴一些(xie)。這種差異主要(yao)(yao)是因(yin)為工(gong)(gong)業(ye)(ye)級(ji)器(qi)件(jian)需要(yao)(yao)具備更(geng)高的(de)(de)穩(wen)定(ding)性(xing)和耐用(yong)性(xing)。支持(chi)Internet寬(kuan)帶(dai)接入(ru)，可(ke)用(yong)于(yu)軌(gui)交(jiao)、工(gong)(gong)廠、安防等(deng)惡(e)劣(lie)條件(jian)下的(de)(de)千兆(zhao)接入(ru)。國產工(gong)(gong)業(ye)(ye)交(jiao)換(huan)(huan)(huan)機(ji)(ji)(ji)(ji)功(gong)(gong)能(neng)

拓賓航(hang)天(tian)系(xi)列非(fei)網管型(xing)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)以太網交(jiao)換機(ji)具有可靠的(de)(de)(de)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)品質和簡單易管理的(de)(de)(de)功能，可以支(zhi)持(chi)客(ke)戶搭建(jian)苛刻工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)環(huan)境下簡單、高可靠的(de)(de)(de)網絡通(tong)(tong)訊(xun)系(xi)統。其具有堅(jian)固金屬外(wai)殼和防(fang)護(hu)涂層(ceng)，抗壓防(fang)腐；無(wu)風扇設計，IP40保護(hu)，防(fang)塵防(fang)污；支(zhi)持(chi)寬溫運行和工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)級冗余電源(yuan)設計；EMC達到工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)3級標準(zhun)，能夠(gou)在嚴苛的(de)(de)(de)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)現(xian)場保障(zhang)穩定通(tong)(tong)訊(xun)。拓賓航(hang)天(tian)系(xi)列工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)交(jiao)換機(ji)提供豐富多樣的(de)(de)(de)端口組合(he)，包括不(bu)同(tong)(tong)(tong)數量的(de)(de)(de)百兆(zhao)、千兆(zhao)和萬(wan)兆(zhao)以太網口；光(guang)口類(lei)型(xing)齊全，支(zhi)持(chi)長短距(ju)傳輸；可選(xuan)擇不(bu)同(tong)(tong)(tong)接口類(lei)型(xing)，以滿(man)足不(bu)同(tong)(tong)(tong)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)現(xian)場的(de)(de)(de)需求。其支(zhi)持(chi)DIN工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)導軌(gui)和壁掛式安(an)裝(zhuang)，尺寸小巧，適合(he)緊湊空間(jian)的(de)(de)(de)機(ji)柜等；同(tong)(tong)(tong)時也支(zhi)持(chi)即(ji)插即(ji)用，快(kuai)速部署。安(an)徽(hui)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)交(jiao)換機(ji)現(xian)貨工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)(ye)(ye)級交(jiao)換機(ji)應用愈(yu)來(lai)愈(yu)廣。

與(yu)STP協(xie)(xie)(xie)議(yi)相(xiang)比，RRPP協(xie)(xie)(xie)議(yi)具有以(yi)(yi)下(xia)優(you)點：1. 更快(kuai)的(de)(de)(de)網絡(luo)(luo)(luo)(luo)恢復(fu)(fu)時間(jian)(jian)：RRPP協(xie)(xie)(xie)議(yi)能(neng)夠在鏈(lian)路斷(duan)(duan)開(kai)后快(kuai)速(su)啟用備(bei)(bei)份(fen)鏈(lian)路，從而減少(shao)(shao)網絡(luo)(luo)(luo)(luo)中(zhong)斷(duan)(duan)的(de)(de)(de)時間(jian)(jian)。相(xiang)比之(zhi)下(xia)，STP協(xie)(xie)(xie)議(yi)的(de)(de)(de)恢復(fu)(fu)時間(jian)(jian)相(xiang)對較長。2. 更高(gao)的(de)(de)(de)網絡(luo)(luo)(luo)(luo)可(ke)(ke)(ke)靠性(xing)：RRPP協(xie)(xie)(xie)議(yi)能(neng)夠通過(guo)(guo)備(bei)(bei)份(fen)鏈(lian)路提供(gong)冗余路徑(jing)，以(yi)(yi)保(bao)證網絡(luo)(luo)(luo)(luo)的(de)(de)(de)連通性(xing)。這(zhe)意味(wei)著(zhu)即(ji)使(shi)某條(tiao)鏈(lian)路發(fa)生故障(zhang)，數據(ju)仍可(ke)(ke)(ke)以(yi)(yi)通過(guo)(guo)備(bei)(bei)份(fen)鏈(lian)路傳輸，減少(shao)(shao)網絡(luo)(luo)(luo)(luo)中(zhong)斷(duan)(duan)的(de)(de)(de)可(ke)(ke)(ke)能(neng)性(xing)。3. 更好的(de)(de)(de)網絡(luo)(luo)(luo)(luo)性(xing)能(neng)：RRPP協(xie)(xie)(xie)議(yi)通過(guo)(guo)使(shi)用備(bei)(bei)份(fen)鏈(lian)路進行數據(ju)轉發(fa)，可(ke)(ke)(ke)以(yi)(yi)減少(shao)(shao)網絡(luo)(luo)(luo)(luo)擁塞和延遲，提高(gao)網絡(luo)(luo)(luo)(luo)的(de)(de)(de)整體(ti)性(xing)能(neng)。4. 簡化(hua)網絡(luo)(luo)(luo)(luo)拓(tuo)撲：使(shi)用RRPP協(xie)(xie)(xie)議(yi)可(ke)(ke)(ke)以(yi)(yi)簡化(hua)網絡(luo)(luo)(luo)(luo)拓(tuo)撲結構，減少(shao)(shao)網絡(luo)(luo)(luo)(luo)部署的(de)(de)(de)復(fu)(fu)雜性(xing)。相(xiang)比之(zhi)下(xia)，STP協(xie)(xie)(xie)議(yi)需(xu)要計算和維護多條(tiao)路徑(jing)，增加了網絡(luo)(luo)(luo)(luo)管理的(de)(de)(de)工(gong)作量。

另(ling)外，工(gong)(gong)(gong)業級交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)在(zai)元器件選(xuan)擇(ze)上(shang)更(geng)(geng)(geng)注重(zhong)耐(nai)用(yong)性(xing)和(he)穩定(ding)性(xing)。它選(xuan)用(yong)的(de)(de)是經過特(te)殊(shu)設(she)計和(he)測(ce)試的(de)(de)工(gong)(gong)(gong)業級器件，可以在(zai)惡(e)劣(lie)的(de)(de)工(gong)(gong)(gong)作環境(jing)(jing)中長時間運行。而商業級交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)則更(geng)(geng)(geng)多(duo)地選(xuan)用(yong)商業級器件，相對來(lai)說穩定(ding)性(xing)和(he)耐(nai)用(yong)性(xing)較低。綜(zong)上(shang)所(suo)述，工(gong)(gong)(gong)業級交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)在(zai)設(she)備(bei)設(she)計使用(yong)壽命和(he)環境(jing)(jing)適(shi)應(ying)性(xing)方面都優于商業級交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)。雖然(ran)價格較高(gao)，但在(zai)一些特(te)殊(shu)環境(jing)(jing)下，選(xuan)擇(ze)工(gong)(gong)(gong)業級交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)是更(geng)(geng)(geng)明(ming)智的(de)(de)選(xuan)擇(ze)。工(gong)(gong)(gong)業交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)的(de)(de)一大特(te)點(dian)就是能(neng)夠適(shi)應(ying)極端(duan)的(de)(de)工(gong)(gong)(gong)業環境(jing)(jing)。普通的(de)(de)交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)在(zai)面對高(gao)溫(wen)、低溫(wen)、灰塵(chen)、濕(shi)氣等(deng)惡(e)劣(lie)條件時可能(neng)會出現故障，而工(gong)(gong)(gong)業交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)則具備(bei)耐(nai)高(gao)溫(wen)、耐(nai)低溫(wen)、防塵(chen)、防水(shui)等(deng)特(te)性(xing)。工(gong)(gong)(gong)業交(jiao)(jiao)(jiao)(jiao)換(huan)(huan)機(ji)具有更(geng)(geng)(geng)廣的(de)(de)應(ying)用(yong)領域，包(bao)括智能(neng)制造、能(neng)源電力、軌道交(jiao)(jiao)(jiao)(jiao)通等(deng)各個行業。

工(gong)(gong)(gong)業交換機(ji)在現代(dai)工(gong)(gong)(gong)業自動化控制中扮演(yan)著(zhu)重要(yao)(yao)的(de)角(jiao)色(se)，被譽為萬物互聯時(shi)代(dai)的(de)工(gong)(gong)(gong)業互聯之心。因此(ci)，我們有(you)必(bi)要(yao)(yao)更(geng)加具體地(di)了解工(gong)(gong)(gong)業交換機(ji)的(de)特點和應用。與普通(tong)的(de)交換機(ji)相比，工(gong)(gong)(gong)業交換機(ji)具備更(geng)高的(de)耐用性(xing)和適(shi)應性(xing)。它們能(neng)(neng)夠在氣候惡劣、環境復(fu)雜(za)的(de)工(gong)(gong)(gong)業級條件下穩定(ding)運行，為工(gong)(gong)(gong)業領域提供可靠(kao)的(de)網絡(luo)通(tong)信解決方案。40. 工(gong)(gong)(gong)業交換機(ji)的(de)定(ding)義可以(yi)是支持(chi)寬溫(wen)的(de)設備，但一般(ban)稱之為“偽工(gong)(gong)(gong)業交換機(ji)”。狹義的(de)工(gong)(gong)(gong)業交換機(ji)不僅要(yao)(yao)支持(chi)寬溫(wen)，還(huan)需要(yao)(yao)具備防塵防水功能(neng)(neng)、POE供電、無風扇(shan)設計等(deng)工(gong)(gong)(gong)業級特性(xing)。根據不同(tong)的(de)應用場景，工(gong)(gong)(gong)業交換機(ji)有(you)時(shi)還(huan)需要(yao)(yao)支持(chi)防爆功能(neng)(neng)。可廣泛應用于智能(neng)(neng)電網、軌道(dao)交通(tong)、智慧(hui)城市、平安(an)城市、新能(neng)(neng)源、智能(neng)(neng)制造(zao)等(deng)工(gong)(gong)(gong)業領域。廣東工(gong)(gong)(gong)業交換機(ji) 品牌

支持RSTP，避免(mian)報文在(zai)環路網(wang)絡(luo)中(zhong)的增生和無限循環。國產(chan)工業交換(huan)機功(gong)能

未來(lai)(lai)，工(gong)(gong)(gong)(gong)業(ye)(ye)交換機(ji)(ji)(ji)的前景(jing)是無限的，因(yin)為(wei)它(ta)在物(wu)聯網(wang)時代充當著物(wu)聯網(wang)關的重要角色(se)。在物(wu)聯網(wang)時代，工(gong)(gong)(gong)(gong)業(ye)(ye)互聯的環境(jing)通常是惡劣的，不可(ke)能(neng)有專門的機(ji)(ji)(ji)房(fang)來(lai)(lai)集中信號(hao)。因(yin)此，工(gong)(gong)(gong)(gong)業(ye)(ye)交換機(ji)(ji)(ji)作為(wei)物(wu)聯網(wang)關可(ke)以(yi)放置(zhi)在樓道通訊井、工(gong)(gong)(gong)(gong)業(ye)(ye)園區(qu)等(deng)多(duo)個地(di)方(fang)使(shi)用(yong)，用(yong)于集中物(wu)聯網(wang)信號(hao)并進(jin)行(xing)處(chu)理。因(yin)此，工(gong)(gong)(gong)(gong)業(ye)(ye)交換機(ji)(ji)(ji)主要用(yong)于工(gong)(gong)(gong)(gong)業(ye)(ye)級(ji)場(chang)景(jing)，目前隨著國(guo)(guo)家(jia)智能(neng)化工(gong)(gong)(gong)(gong)業(ye)(ye)建設的加速，許多(duo)場(chang)所需要通過(guo)交換機(ji)(ji)(ji)來(lai)(lai)承載(zai)網(wang)絡，這時使(shi)用(yong)工(gong)(gong)(gong)(gong)業(ye)(ye)交換機(ji)(ji)(ji)就顯(xian)得尤為(wei)必(bi)要。一(yi)(yi)些國(guo)(guo)內的大(da)型研究機(ji)(ji)(ji)構，例如(ru)國(guo)(guo)家(jia)電網(wang)，都(dou)擁有專業(ye)(ye)的工(gong)(gong)(gong)(gong)業(ye)(ye)級(ji)測(ce)試環境(jing)，一(yi)(yi)般情況下需要工(gong)(gong)(gong)(gong)業(ye)(ye)交換機(ji)(ji)(ji)通過(guo)相關的工(gong)(gong)(gong)(gong)業(ye)(ye)資(zi)質測(ce)試才能(neng)在各個行(xing)業(ye)(ye)中使(shi)用(yong)。國(guo)(guo)產工(gong)(gong)(gong)(gong)業(ye)(ye)交換機(ji)(ji)(ji)功(gong)能(neng)

深圳(zhen)(zhen)市拓賓(bin)科技有(you)(you)限公(gong)司(si)(si)是(shi)以(yi)(yi)(yi)(yi)工(gong)(gong)(gong)(gong)業(ye)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)級(ji)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)以(yi)(yi)(yi)(yi)太(tai)(tai)網(wang)(wang)(wang)(wang)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，網(wang)(wang)(wang)(wang)管(guan)(guan)(guan)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)研發(fa)、生產、銷售(shou)、服務為(wei)(wei)一體的(de)(de)深圳(zhen)(zhen)市拓賓(bin)科技有(you)(you)限公(gong)司(si)(si)主要(yao)從事工(gong)(gong)(gong)(gong)業(ye)網(wang)(wang)(wang)(wang)絡(luo)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)、工(gong)(gong)(gong)(gong)業(ye)級(ji)光(guang)纖交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)、以(yi)(yi)(yi)(yi)太(tai)(tai)網(wang)(wang)(wang)(wang)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)、環網(wang)(wang)(wang)(wang)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)、POE供電(dian)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)、光(guang)纖收發(fa)器(qi)、光(guang)電(dian)轉換(huan)(huan)(huan)(huan)(huan)器(qi)產品(pin)(pin)的(de)(de)設計開(kai)發(fa)、生產制造、銷售(shou)和技術服務的(de)(de)廠(chang)家。產品(pin)(pin)有(you)(you)百兆、千兆、導(dao)軌式、管(guan)(guan)(guan)理(li)型、網(wang)(wang)(wang)(wang)管(guan)(guan)(guan)型、環網(wang)(wang)(wang)(wang)管(guan)(guan)(guan)理(li)型、自愈環網(wang)(wang)(wang)(wang)等(deng)類型。企業(ye)，公(gong)司(si)(si)成立于2013-03-13，地址在(zai)深圳(zhen)(zhen)市光(guang)明新區(qu)(qu)公(gong)明街(jie)道(dao)塘家社區(qu)(qu)觀(guan)光(guang)路匯業(ye)科技園廠(chang)房(fang)3棟C區(qu)(qu)第(di)3層303號。至(zhi)創始至(zhi)今，公(gong)司(si)(si)已經頗有(you)(you)規模。公(gong)司(si)(si)主要(yao)產品(pin)(pin)有(you)(you)工(gong)(gong)(gong)(gong)業(ye)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)級(ji)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)以(yi)(yi)(yi)(yi)太(tai)(tai)網(wang)(wang)(wang)(wang)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，網(wang)(wang)(wang)(wang)管(guan)(guan)(guan)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)等(deng)，公(gong)司(si)(si)工(gong)(gong)(gong)(gong)程技術人(ren)員(yuan)、行政管(guan)(guan)(guan)理(li)人(ren)員(yuan)、產品(pin)(pin)制造及售(shou)后服務人(ren)員(yuan)均有(you)(you)多年行業(ye)經驗(yan)。并與上下游(you)企業(ye)保持密(mi)切(qie)的(de)(de)合(he)作關系。拓賓(bin),TUOBIN以(yi)(yi)(yi)(yi)符合(he)行業(ye)標準的(de)(de)產品(pin)(pin)質量(liang)為(wei)(wei)目標，并始終如(ru)一地堅守這一原則，正是(shi)這種(zhong)高標準的(de)(de)自我(wo)要(yao)求，產品(pin)(pin)獲得市場及消費者的(de)(de)高度認(ren)可。深圳(zhen)(zhen)市拓賓(bin)科技有(you)(you)限公(gong)司(si)(si)以(yi)(yi)(yi)(yi)先進工(gong)(gong)(gong)(gong)藝為(wei)(wei)基(ji)礎、以(yi)(yi)(yi)(yi)產品(pin)(pin)質量(liang)為(wei)(wei)根本、以(yi)(yi)(yi)(yi)技術創新為(wei)(wei)動力(li)，開(kai)發(fa)并推出(chu)多項具有(you)(you)競爭力(li)的(de)(de)工(gong)(gong)(gong)(gong)業(ye)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)級(ji)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)以(yi)(yi)(yi)(yi)太(tai)(tai)網(wang)(wang)(wang)(wang)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，網(wang)(wang)(wang)(wang)管(guan)(guan)(guan)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)產品(pin)(pin)，確保了在(zai)工(gong)(gong)(gong)(gong)業(ye)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)級(ji)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，工(gong)(gong)(gong)(gong)業(ye)以(yi)(yi)(yi)(yi)太(tai)(tai)網(wang)(wang)(wang)(wang)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)，網(wang)(wang)(wang)(wang)管(guan)(guan)(guan)交(jiao)(jiao)換(huan)(huan)(huan)(huan)(huan)機(ji)(ji)(ji)(ji)(ji)市場的(de)(de)優勢。

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