包頭熱軋無縫鋼管貨源(yuan)充足(zu)

<包頭>鵬鑫鋼鐵是包頭專注生產、銷售包頭無縫鋼管廠的廠家，公司擁有先進的設備，雄厚的技術力量，科學的工藝流程，完善的質量檢測體系，采用優良的包頭無縫鋼管廠原材料，嚴把質量關。我廠擁有先進的管理經驗、生產流程和質量控制手段，保證為客戶提供高質量的包頭無縫鋼管廠產品。在我們強調產品質量的同時，還積極與客戶進行溝通，了解客戶的需求，并為客戶提供貼心和及時的售后服務。公司始終堅持以用戶至上，質量至上，信譽至上，服務至上為經營方針，以優良的包頭無縫鋼管廠產品和貼心的服務與各界朋友真誠合作，共同發展。

　　包(bao)頭Q355B無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)用(yong)(yong)(yong)途：1、輸(shu)送流體用(yong)(yong)(yong)：消防噴(pen)淋、供水、輸(shu)送流體、冷(leng)熱(re)(re)循環水等(deng)(deng)；2、結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)：作結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)(鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、螺(luo)(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、包(bao)頭無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))、鍋爐結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)(包(bao)頭無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、螺(luo)(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))、橋梁(liang)結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)、機(ji)(ji)(ji)械(xie)(xie)結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)(螺(luo)(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、直(zhi)(zhi)(zhi)縫(feng)(feng)(feng)(feng)(feng)(feng)焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))、結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、彈(dan)簧用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(彈(dan)簧管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)件(jian)(jian)、盤(pan)形(xing)(xing)彈(dan)簧用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)、盤(pan)形(xing)(xing)彈(dan)簧用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))；；3、機(ji)(ji)(ji)械(xie)(xie)結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、彈(dan)簧用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)、耐(nai)熱(re)(re)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)、石(shi)油(you)鉆桿(gan)用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)、耐(nai)腐蝕結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)；4、管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)用(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)。q4355b無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)力學(xue)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)，抗拉強(qiang)度(du)(du)(du)470～630Mpa，伸長(chang)率≥22％，屈服(fu)強(qiang)度(du)(du)(du)355Mpa，沖擊功(gong)≥34J，許用(yong)(yong)(yong)拉應(ying)力172.5。Q355b是(shi)(shi)(shi)以(yi)屈服(fu)強(qiang)度(du)(du)(du)命名的(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)號，保證化(hua)(hua)(hua)學(xue)成(cheng)(cheng)分(fen)，保證機(ji)(ji)(ji)械(xie)(xie)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)廠出廠做0度(du)(du)(du)沖擊試(shi)驗，做180度(du)(du)(du)冷(leng)彎試(shi)驗，是(shi)(shi)(shi)高(gao)強(qiang)度(du)(du)(du)碳(tan)素鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)，用(yong)(yong)(yong)于受力部件(jian)(jian)。 　　Q355鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)是(shi)(shi)(shi)一(yi)(yi)種(zhong)(zhong)中(zhong)國(guo)低合(he)(he)金(jin)高(gao)強(qiang)度(du)(du)(du)結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)，替(ti)代了(le)Q345，材(cai)料密度(du)(du)(du)為(wei)(wei)7.85 g / cm3。根據GB / T 1591-2018，Q355具(ju)有(you)3個(ge)質量(liang)(liang)等(deng)(deng)級：Q355B，Q355C和(he)(he)(he)(he)(he)Q355D。“ Q”是(shi)(shi)(shi)漢語拼(pin)音的(de)(de)(de)(de)(de)第＊個(ge)字母，表示(shi)屈服(fu)強(qiang)度(du)(du)(du)，“ 355”是(shi)(shi)(shi)指鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)厚(hou)≤16mm時(shi)(shi)屈服(fu)強(qiang)度(du)(du)(du)的(de)(de)(de)(de)(de)＊小(xiao)值355 MPa，抗拉強(qiang)度(du)(du)(du)為(wei)(wei)470-630 Mpa。 　　Q355鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)具(ju)有(you)良好的(de)(de)(de)(de)(de)機(ji)(ji)(ji)械(xie)(xie)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)，良好的(de)(de)(de)(de)(de)焊(han)接性(xing)(xing)(xing)(xing)(xing)，冷(leng)熱(re)(re)加(jia)工(gong)(gong)(gong)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)和(he)(he)(he)(he)(he)耐(nai)腐蝕性(xing)(xing)(xing)(xing)(xing)。可(ke)(ke)用(yong)(yong)(yong)于制(zhi)(zhi)造船舶，鍋爐，壓(ya)(ya)(ya)力容器，石(shi)油(you)儲罐，橋梁(liang)，電站設備，起重運輸(shu)機(ji)(ji)(ji)械(xie)(xie)和(he)(he)(he)(he)(he)其(qi)(qi)他較(jiao)高(gao)負荷(he)的(de)(de)(de)(de)(de)焊(han)接結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)件(jian)(jian)。 　　1.鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按化(hua)(hua)(hua)學(xue)成(cheng)(cheng)分(fen)可(ke)(ke)分(fen)為(wei)(wei)普(pu)通(tong)(tong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)(he)(he)合(he)(he)金(jin)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 　　普(pu)通(tong)(tong)8162標(biao)準鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)化(hua)(hua)(hua)學(xue)成(cheng)(cheng)分(fen)較(jiao)高(gao)，機(ji)(ji)(ji)械(xie)(xie)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)和(he)(he)(he)(he)(he)力學(xue)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)好；通(tong)(tong)常(chang)用(yong)(yong)(yong)熱(re)(re)軋(ya)(ya)或冷(leng)拔制(zhi)(zhi)成(cheng)(cheng)的(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。它(ta)們的(de)(de)(de)(de)(de)機(ji)(ji)(ji)械(xie)(xie)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)較(jiao)高(gao)，但(dan)不(bu)(bu)(bu)適(shi)(shi)于作流體輸(shu)送管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)(he)(he)結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)件(jian)(jian)。因此(ci)(ci)，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)在(zai)一(yi)(yi)些領域(yu)不(bu)(bu)(bu)能(neng)(neng)(neng)(neng)完全替(ti)代8163無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。由于它(ta)具(ju)有(you)較(jiao)高(gao)的(de)(de)(de)(de)(de)機(ji)(ji)(ji)械(xie)(xie)強(qiang)度(du)(du)(du)、較(jiao)好的(de)(de)(de)(de)(de)耐(nai)腐蝕性(xing)(xing)(xing)(xing)(xing)和(he)(he)(he)(he)(he)良好的(de)(de)(de)(de)(de)耐(nai)陰(yin)極剝(bo)離性(xing)(xing)(xing)(xing)(xing)，已(yi)被廣泛用(yong)(yong)(yong)于制(zhi)(zhi)造結(jie)(jie)(jie)(jie)(jie)構(gou)(gou)件(jian)(jian)。但(dan)是(shi)(shi)(shi)隨著(zhu)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)技(ji)(ji)術(shu)的(de)(de)(de)(de)(de)發展(zhan)以(yi)及(ji)人(ren)們對(dui)質量(liang)(liang)和(he)(he)(he)(he)(he)的(de)(de)(de)(de)(de)日益(yi)重視，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)生產(chan)(chan)技(ji)(ji)術(shu)也(ye)在(zai)不(bu)(bu)(bu)斷進(jin)(jin)步和(he)(he)(he)(he)(he)發展(zhan)。 　　2.按照外徑(jing)(jing)不(bu)(bu)(bu)同(tong)可(ke)(ke)分(fen)為(wei)(wei)Φ12-Φ1020其(qi)(qi)中(zhong)Φ30以(yi)下(xia)為(wei)(wei)小(xiao)口徑(jing)(jing)無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，大口徑(jing)(jing)無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)通(tong)(tong)常(chang)用(yong)(yong)(yong)熱(re)(re)軋(ya)(ya)及(ji)熱(re)(re)擴、擠壓(ya)(ya)(ya)制(zhi)(zhi)造。 　　鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)通(tong)(tong)常(chang)分(fen)為(wei)(wei)無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)有(you)螺(luo)(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、直(zhi)(zhi)(zhi)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)(he)(he)無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)幾種(zhong)(zhong)，不(bu)(bu)(bu)同(tong)的(de)(de)(de)(de)(de)規格型(xing)(xing)號會導致(zhi)其(qi)(qi)生產(chan)(chan)過(guo)程(cheng)(cheng)中(zhong)的(de)(de)(de)(de)(de)要(yao)求不(bu)(bu)(bu)同(tong)，也(ye)會導致(zhi)生產(chan)(chan)成(cheng)(cheng)本不(bu)(bu)(bu)同(tong)。通(tong)(tong)常(chang)情況下(xia)，人(ren)們會根據材(cai)質要(yao)求以(yi)及(ji)生產(chan)(chan)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)藝(yi)等(deng)(deng)來(lai)選擇適(shi)(shi)合(he)(he)的(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)型(xing)(xing)號進(jin)(jin)行生產(chan)(chan)。當然了(le)，作為(wei)(wei)一(yi)(yi)種(zhong)(zhong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)材(cai)，它(ta)不(bu)(bu)(bu)僅要(yao)有(you)好的(de)(de)(de)(de)(de)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)以(yi)及(ji)高(gao)級別的(de)(de)(de)(de)(de)用(yong)(yong)(yong)途，也(ye)要(yao)在(zai)生產(chan)(chan)的(de)(de)(de)(de)(de)時(shi)(shi)候(hou)(hou)做到生產(chan)(chan)工(gong)(gong)(gong)藝(yi)合(he)(he)理(li)以(yi)及(ji)生產(chan)(chan)技(ji)(ji)術(shu)先進(jin)(jin)。除(chu)此(ci)(ci)之(zhi)外，在(zai)使用(yong)(yong)(yong)的(de)(de)(de)(de)(de)時(shi)(shi)候(hou)(hou)，也(ye)要(yao)做到合(he)(he)理(li)的(de)(de)(de)(de)(de)使用(yong)(yong)(yong)。客戶(hu)在(zai)設計選購的(de)(de)(de)(de)(de)時(shi)(shi)候(hou)(hou)，一(yi)(yi)定(ding)(ding)要(yao)選擇合(he)(he)適(shi)(shi)的(de)(de)(de)(de)(de)材(cai)質與種(zhong)(zhong)類。下(xia)面(mian)為(wei)(wei)大家介紹(shao)一(yi)(yi)下(xia)無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠家生產(chan)(chan)工(gong)(gong)(gong)藝(yi)和(he)(he)(he)(he)(he)常(chang)見問題及(ji)解決(jue)辦法(fa)。 　　3.按斷面(mian)形(xing)(xing)式可(ke)(ke)分(fen)為(wei)(wei)圓(yuan)(yuan)形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)(he)(he)異形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 　　圓(yuan)(yuan)形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)坯(pi)(pi)加(jia)熱(re)(re)到一(yi)(yi)定(ding)(ding)溫度(du)(du)(du)，在(zai)定(ding)(ding)徑(jing)(jing)機(ji)(ji)(ji)上(shang)進(jin)(jin)行定(ding)(ding)徑(jing)(jing)。成(cheng)(cheng)型(xing)(xing)后的(de)(de)(de)(de)(de)圓(yuan)(yuan)形(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)坯(pi)(pi)沿(yan)直(zhi)(zhi)(zhi)線運動。在(zai)圓(yuan)(yuan)周上(shang)劃一(yi)(yi)刀，然后從邊緣向(xiang)中(zhong)心(xin)方向(xiang)旋(xuan)轉，并在(zai)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)上(shang)留下(xia)一(yi)(yi)條圓(yuan)(yuan)形(xing)(xing)溝槽。鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)旋(xuan)轉方向(xiang)是(shi)(shi)(shi)沿(yan)著(zhu)溝槽的(de)(de)(de)(de)(de)圓(yuan)(yuan)周方向(xiang)前進(jin)(jin)。當金(jin)屬(shu)(shu)擠壓(ya)(ya)(ya)到溝槽中(zhong)時(shi)(shi)，被擠壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)金(jin)屬(shu)(shu)就會沿(yan)著(zhu)溝槽繼續前進(jin)(jin)，直(zhi)(zhi)(zhi)至將原來(lai)金(jin)屬(shu)(shu)擠壓(ya)(ya)(ya)成(cheng)(cheng)圓(yuan)(yuan)形(xing)(xing)狀態(tai)。 　　4.水壓(ya)(ya)(ya)試(shi)驗、擠壓(ya)(ya)(ya)、彎曲等(deng)(deng)普(pu)通(tong)(tong)熱(re)(re)軋(ya)(ya)無(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)在(zai)普(pu)通(tong)(tong)圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)(pi)中(zhong)送入橫軋(ya)(ya)裝置，由擠壓(ya)(ya)(ya)輥兩端向(xiang)內壓(ya)(ya)(ya)入管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)，擠壓(ya)(ya)(ya)成(cheng)(cheng)圓(yuan)(yuan)形(xing)(xing)或方形(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 　　在(zai)此(ci)(ci)過(guo)程(cheng)(cheng)中(zhong)，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)中(zhong)產(chan)(chan)生的(de)(de)(de)(de)(de)微細(xi)氣(qi)(qi)泡，對(dui)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)帶(dai)的(de)(de)(de)(de)(de)附著(zhu)力、焊(han)縫(feng)(feng)(feng)(feng)(feng)(feng)處的(de)(de)(de)(de)(de)力學(xue)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)和(he)(he)(he)(he)(he)表面(mian)質量(liang)(liang)都產(chan)(chan)生了(le)影響。若氣(qi)(qi)泡過(guo)大，則擠壓(ya)(ya)(ya)輥容易卡死。一(yi)(yi)般擠壓(ya)(ya)(ya)輥對(dui)輥的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)下(xia)量(liang)(liang)為(wei)(wei)0.3——0.5 MPa (國(guo)標(biao)中(zhong)對(dui)輥壓(ya)(ya)(ya)下(xia)量(liang)(liang)為(wei)(wei)0.2 MPa-0.5 MPa)且擠壓(ya)(ya)(ya)輥和(he)(he)(he)(he)(he)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)之(zhi)間(jian)的(de)(de)(de)(de)(de)距離不(bu)(bu)(bu)宜太大，以(yi)保證鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)壁厚(hou)均勻，且擠壓(ya)(ya)(ya)輥壓(ya)(ya)(ya)力過(guo)高(gao)造成(cheng)(cheng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)損傷嚴(yan)重。