鋼(gang)(gang)管(guan)(guan)(guan)按制管(guan)(guan)(guan)材質（即(ji)鋼(gang)(gang)種）可分為(wei)：碳素(su)管(guan)(guan)(guan)和(he)合(he)(he)金(jin)(jin)管(guan)(guan)(guan)、不銹(xiu)鋼(gang)(gang)管(guan)(guan)(guan)等(deng)。碳素(su)管(guan)(guan)(guan)又(you)(you)可分為(wei)普(pu)通碳素(su)鋼(gang)(gang)管(guan)(guan)(guan)和(he)優良碳素(su)結構(gou)(gou)管(guan)(guan)(guan)。合(he)(he)金(jin)(jin)管(guan)(guan)(guan)又(you)(you)可分為(wei)：低(di)合(he)(he)金(jin)(jin)管(guan)(guan)(guan)、合(he)(he)金(jin)(jin)結構(gou)(gou)管(guan)(guan)(guan)、高(gao)合(he)(he)金(jin)(jin)管(guan)(guan)(guan)。軸承管(guan)(guan)(guan)、耐熱耐酸不銹(xiu)管(guan)(guan)(guan)、精密合(he)(he)金(jin)(jin)（如可伐合(he)(he)金(jin)(jin)）管(guan)(guan)(guan)以及(ji)高(gao)溫合(he)(he)金(jin)(jin)管(guan)(guan)(guan)等(deng)。鋼(gang)(gang)管(guan)(guan)(guan)按管(guan)(guan)(guan)端(duan)聯接方式可分為(wei)：光管(guan)(guan)(guan)（管(guan)(guan)(guan)端(duan)不帶(dai)螺(luo)(luo)(luo)紋）和(he)車絲(si)(si)管(guan)(guan)(guan)（管(guan)(guan)(guan)端(duan)帶(dai)有螺(luo)(luo)(luo)紋）。車絲(si)(si)管(guan)(guan)(guan)又(you)(you)分為(wei)：普(pu)通車絲(si)(si)管(guan)(guan)(guan)和(he)管(guan)(guan)(guan)端(duan)加厚車絲(si)(si)管(guan)(guan)(guan)。加厚車絲(si)(si)管(guan)(guan)(guan)還(huan)可分為(wei)：外(wai)加厚（帶(dai)外(wai)螺(luo)(luo)(luo)紋）、內加厚（帶(dai)內螺(luo)(luo)(luo)紋）和(he)內外(wai)加厚（帶(dai)內外(wai)螺(luo)(luo)(luo)紋）等(deng)地車絲(si)(si)管(guan)(guan)(guan)。車絲(si)(si)管(guan)(guan)(guan)若(ruo)按螺(luo)(luo)(luo)紋型(xing)式也可分為(wei)：普(pu)通圓(yuan)(yuan)柱或圓(yuan)(yuan)錐螺(luo)(luo)(luo)紋和(he)特殊螺(luo)(luo)(luo)紋等(deng)地車絲(si)(si)管(guan)(guan)(guan)。另外(wai)，根(gen)據用(yong)戶需要，車絲(si)(si)管(guan)(guan)(guan)一(yi)般均(jun)配有管(guan)(guan)(guan)接頭(tou)交貨。無縫鋼(gang)(gang)管(guan)(guan)(guan)在軋制時一(yi)次成型(xing)。浙江耐壓鋼(gang)(gang)管(guan)(guan)(guan)供應商(shang)

無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)表(biao)明(ming)方式為直徑(jing)，壁厚(hou)(hou)，厚(hou)(hou)壁管(guan)(guan)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)關鍵用(yong)以機(ji)械加工(gong)制造(zao)(zao)，煤礦業，液壓機(ji)鋼(gang)(gang)(gang)，等各種主(zhu)要用(yong)途。厚(hou)(hou)壁管(guan)(guan)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)歸(gui)類——熱扎(zha)厚(hou)(hou)壁管(guan)(guan)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)、熱軋厚(hou)(hou)壁管(guan)(guan)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)、冷(leng)拉厚(hou)(hou)壁管(guan)(guan)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)、擠(ji)(ji)壓成(cheng)型厚(hou)(hou)壁管(guan)(guan)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)、頂管(guan)(guan)施工(gong)構造(zao)(zao)用(yong)不銹(xiu)鋼(gang)(gang)(gang)板無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(GB/T14975-1994)是普遍適用(yong)于化工(gong)廠、原(yuan)油、紡織工(gong)業、診(zhen)療、食(shi)品類、機(ji)械設(she)備等制造(zao)(zao)業的(de)抗腐蝕管(guan)(guan)路和(he)零(ling)部件及(ji)零(ling)件的(de)不銹(xiu)鋼(gang)(gang)(gang)板制作的(de)熱扎(zha)(擠(ji)(ji)、擴)和(he)冷(leng)拉(軋)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)。液體(ti)運(yun)輸用(yong)不銹(xiu)鋼(gang)(gang)(gang)板無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)(GB/T14976-1994)是用(yong)來傳送液體(ti)的(de)不銹(xiu)鋼(gang)(gang)(gang)板制作的(de)熱扎(zha)(擠(ji)(ji)、擴)和(he)冷(leng)拉(軋)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)。浙江耐壓鋼(gang)(gang)(gang)管(guan)(guan)供(gong)應商用(yong)鋼(gang)(gang)(gang)管(guan)(guan)制造(zao)(zao)公路橋梁可以很大減少涂保護層的(de)面積(ji)。

鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)按生(sheng)產方法(fa)(fa)可分為兩大類：無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)和(he)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan),焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)簡稱為焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)。1.無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)按生(sheng)產方法(fa)(fa)可分為：熱(re)軋無(wu)縫(feng)(feng)(feng)管(guan)(guan)(guan)(guan)、冷(leng)拔(ba)管(guan)(guan)(guan)(guan)、精(jing)密鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、熱(re)擴(kuo)管(guan)(guan)(guan)(guan)、冷(leng)旋壓管(guan)(guan)(guan)(guan)和(he)擠壓管(guan)(guan)(guan)(guan)等(deng)(deng)。成捆的(de)(de)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)用(yong)優(you)良碳素鋼(gang)(gang)(gang)(gang)或合(he)金(jin)鋼(gang)(gang)(gang)(gang)制成，有熱(re)軋、冷(leng)軋（拔(ba)）之分。2.焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)因其(qi)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)工(gong)藝不同而(er)分為爐焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)、電(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)（電(dian)(dian)(dian)阻焊(han)(han)(han)(han)(han)(han)）管(guan)(guan)(guan)(guan)和(he)自動電(dian)(dian)(dian)弧焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)，因其(qi)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)形(xing)式(shi)的(de)(de)不同分為直(zhi)縫(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)和(he)螺旋焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)兩種(zhong)，因其(qi)端(duan)部形(xing)狀又分為圓(yuan)形(xing)焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)和(he)異型（方、扁等(deng)(deng)）焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)。焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)是由卷成管(guan)(guan)(guan)(guan)形(xing)的(de)(de)鋼(gang)(gang)(gang)(gang)板以對縫(feng)(feng)(feng)或螺旋縫(feng)(feng)(feng)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)而(er)成，在制造方法(fa)(fa)上，又分為低壓流(liu)體輸送用(yong)焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、螺旋縫(feng)(feng)(feng)電(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、直(zhi)接(jie)(jie)(jie)卷焊(han)(han)(han)(han)(han)(han)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、電(dian)(dian)(dian)焊(han)(han)(han)(han)(han)(han)管(guan)(guan)(guan)(guan)等(deng)(deng)。無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)可用(yong)于(yu)各(ge)種(zhong)行業的(de)(de)液體氣(qi)壓管(guan)(guan)(guan)(guan)道(dao)和(he)氣(qi)體管(guan)(guan)(guan)(guan)道(dao)等(deng)(deng)。焊(han)(han)(han)(han)(han)(han)接(jie)(jie)(jie)管(guan)(guan)(guan)(guan)道(dao)可用(yong)于(yu)輸水管(guan)(guan)(guan)(guan)道(dao)、煤氣(qi)管(guan)(guan)(guan)(guan)道(dao)、暖氣(qi)管(guan)(guan)(guan)(guan)道(dao)、電(dian)(dian)(dian)器管(guan)(guan)(guan)(guan)道(dao)等(deng)(deng)。

冷(leng)拔精(jing)(jing)密(mi)(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)：冷(leng)拔精(jing)(jing)密(mi)(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)是一種高(gao)精(jing)(jing)密(mi)(mi)(mi)的鋼(gang)管(guan)(guan)(guan)(guan)材(cai)料。主要類別有：精(jing)(jing)密(mi)(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)，精(jing)(jing)密(mi)(mi)(mi)液壓無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)，冷(leng)拔精(jing)(jing)密(mi)(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)，冷(leng)軋精(jing)(jing)密(mi)(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)，高(gao)精(jing)(jing)密(mi)(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)，精(jing)(jing)密(mi)(mi)(mi)光亮無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)。冷(leng)拔精(jing)(jing)密(mi)(mi)(mi)鋼(gang)管(guan)(guan)(guan)(guan)由于精(jing)(jing)密(mi)(mi)(mi)鋼(gang)管(guan)(guan)(guan)(guan)內外壁(bi)無(wu)(wu)氧(yang)化層、承受高(gao)壓無(wu)(wu)泄漏、高(gao)精(jing)(jing)度、高(gao)光潔度、冷(leng)彎不變(bian)形、擴(kuo)口(kou)、壓扁(bian)無(wu)(wu)裂縫(feng)(feng)(feng)等(deng)優點，所以主要用(yong)來生(sheng)產氣動或液壓元件的產品(pin)，如汽(qi)缸(gang)或油缸(gang)，可以是無(wu)(wu)縫(feng)(feng)(feng)管(guan)(guan)(guan)(guan)。產品(pin)特點：1、外徑更小。2、精(jing)(jing)度高(gao)可做小批量生(sheng)產。3、冷(leng)拔成品(pin)精(jing)(jing)度高(gao)，表面質量好。4、鋼(gang)管(guan)(guan)(guan)(guan)橫面積更復雜(za)。5、鋼(gang)管(guan)(guan)(guan)(guan)性能更優越，金屬比(bi)較密(mi)(mi)(mi)。無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)跟有縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)的外觀不同(tong)。

無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)根據不(bu)同用(yong)(yong)途還可分為：石油鉆探管(guan)(guan)(guan)(guan)是(shi)(shi)用(yong)(yong)于石油鉆探兩端內(nei)(nei)加厚(hou)或(huo)外加厚(hou)的(de)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)分車絲(si)(si)和不(bu)車絲(si)(si)兩種，車絲(si)(si)管(guan)(guan)(guan)(guan)用(yong)(yong)接頭聯結，不(bu)車絲(si)(si)管(guan)(guan)(guan)(guan)用(yong)(yong)對焊的(de)方法與工具接頭聯結。船舶用(yong)(yong)碳(tan)鋼(gang)(gang)(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)是(shi)(shi)制(zhi)造(zao)船舶I級耐壓(ya)管(guan)(guan)(guan)(guan)系、Ⅱ級耐壓(ya)管(guan)(guan)(guan)(guan)系、鍋爐及過熱(re)器(qi)用(yong)(yong)的(de)碳(tan)素鋼(gang)(gang)(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。碳(tan)素鋼(gang)(gang)(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)壁工作溫度不(bu)超過450℃，合金鋼(gang)(gang)(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)壁工作溫度超過450℃。汽車半軸套(tao)管(guan)(guan)(guan)(guan)用(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)是(shi)(shi)制(zhi)造(zao)汽車半軸套(tao)管(guan)(guan)(guan)(guan)及驅動(dong)橋橋殼(ke)軸管(guan)(guan)(guan)(guan)用(yong)(yong)的(de)優良碳(tan)素結構鋼(gang)(gang)(gang)(gang)和合金結構鋼(gang)(gang)(gang)(gang)熱(re)軋無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。柴油機用(yong)(yong)高壓(ya)油管(guan)(guan)(guan)(guan)是(shi)(shi)制(zhi)造(zao)柴油機噴射系統(tong)高壓(ya)管(guan)(guan)(guan)(guan)用(yong)(yong)的(de)冷拔(ba)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。液壓(ya)和氣(qi)(qi)動(dong)缸筒用(yong)(yong)精(jing)密(mi)內(nei)(nei)徑(jing)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)是(shi)(shi)制(zhi)造(zao)液壓(ya)和氣(qi)(qi)動(dong)缸筒用(yong)(yong)的(de)具有精(jing)密(mi)內(nei)(nei)徑(jing)尺寸的(de)冷拔(ba)或(huo)冷軋精(jing)密(mi)無(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。本標準適(shi)用(yong)(yong)于水(shui)、空(kong)氣(qi)(qi)、采暖蒸汽、燃氣(qi)(qi)等低壓(ya)流體輸送用(yong)(yong)焊接鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。廣西(xi)防腐鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)廠家電話

無縫鋼(gang)管(guan)可用作輸送流體(ti)的管(guan)道。浙江耐壓鋼(gang)管(guan)供應商

無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)的(de)(de)(de)(de)實際對(dui)接(jie)(jie)焊(han)(han)(han)生(sheng)產流程(cheng)(cheng)：1、在卷(juan)板好好地精(jing)確(que)(que)定位后(hou)，開(kai)(kai)卷(juan)機的(de)(de)(de)(de)上(shang)下錐頭可(ke)(ke)以(yi)(yi)插到(dao)卷(juan)鋼(gang)(gang)(gang)里邊另(ling)外轉動，把帶(dai)(dai)(dai)(dai)領送(song)至(zhi)夾料(liao)(liao)(liao)輥里邊，夾料(liao)(liao)(liao)輥上(shang)輥壓(ya)下，卷(juan)鋼(gang)(gang)(gang)小(xiao)轎車(che)和磁性輥就可(ke)(ke)以(yi)(yi)返回(hui)原點(dian)。2、為了(le)更好地讓彈簧鋼(gang)(gang)(gang)帶(dai)(dai)(dai)(dai)能夠精(jing)確(que)(que)對(dui)中運(yun)作，開(kai)(kai)卷(juan)機運(yun)行(xing)前(qian)可(ke)(ke)以(yi)(yi)總體軸徑挪動+150mm。運(yun)行(xing)開(kai)(kai)卷(juan)機后(hou)，熱軋帶(dai)(dai)(dai)(dai)鋼(gang)(gang)(gang)根(gen)據(ju)夾送(song)輥抵達裝(zhuang)了(le)除(chu)塵裝(zhuang)置(zhi)的(de)(de)(de)(de)校直(zhi)機。3、經校直(zhi)的(de)(de)(de)(de)彈簧鋼(gang)(gang)(gang)帶(dai)(dai)(dai)(dai)用(yong)伸縮式液壓(ya)剪對(dui)熱軋帶(dai)(dai)(dai)(dai)鋼(gang)(gang)(gang)的(de)(de)(de)(de)頭、尾開(kai)(kai)展(zhan)(zhan)裁切(qie)(剪開(kai)(kai)熱軋帶(dai)(dai)(dai)(dai)鋼(gang)(gang)(gang)頭可(ke)(ke)以(yi)(yi)馬上(shang)滑到(dao)廢(fei)棄物箱里邊，剪下來的(de)(de)(de)(de)熱軋帶(dai)(dai)(dai)(dai)鋼(gang)(gang)(gang)尾可(ke)(ke)以(yi)(yi)用(yong)輸出設備搜集線上(shang)兩(liang)側的(de)(de)(de)(de)專門用(yong)的(de)(de)(de)(de)型瀝青混合料(liao)(liao)(liao)箱中)。無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)生(sheng)產工藝流程(cheng)(cheng)簡易，生(sheng)產制(zhi)造高效率，低成(cheng)本(ben)，發展(zhan)(zhan)趨勢較快。平不(bu)銹鋼(gang)(gang)(gang)圓(yuan)管(guan)(guan)(guan)的(de)(de)(de)(de)抗壓(ya)強度一(yi)(yi)般(ban)比無(wu)縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)高，可(ke)(ke)用(yong)窄小(xiao)的(de)(de)(de)(de)胚(pei)料(liao)(liao)(liao)生(sheng)產制(zhi)造管(guan)(guan)(guan)經很大的(de)(de)(de)(de)焊(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)管(guan)(guan)(guan)，還能夠用(yong)一(yi)(yi)樣(yang)(yang)總寬的(de)(de)(de)(de)胚(pei)料(liao)(liao)(liao)生(sheng)產制(zhi)造管(guan)(guan)(guan)經不(bu)一(yi)(yi)樣(yang)(yang)的(de)(de)(de)(de)焊(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)管(guan)(guan)(guan)。可(ke)(ke)是與同樣(yang)(yang)長(chang)短的(de)(de)(de)(de)直(zhi)縫(feng)(feng)管(guan)(guan)(guan)對(dui)比，焊(han)(han)(han)接(jie)(jie)長(chang)短提(ti)升30~100%，并且生(sheng)產制(zhi)造速(su)率較低。直(zhi)徑大或偏厚的(de)(de)(de)(de)焊(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)管(guan)(guan)(guan)，一(yi)(yi)般(ban)用(yong)鋼(gang)(gang)(gang)胚(pei)料(liao)(liao)(liao)立即(ji)(ji)制(zhi)成(cheng)，而(er)小(xiao)焊(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)管(guan)(guan)(guan)厚壁(bi)焊(han)(han)(han)接(jie)(jie)鋼(gang)(gang)(gang)管(guan)(guan)(guan)只必須根(gen)據(ju)尼(ni)龍(long)帶(dai)(dai)(dai)(dai)立即(ji)(ji)焊(han)(han)(han)接(jie)(jie)。浙江耐(nai)壓(ya)鋼(gang)(gang)(gang)管(guan)(guan)(guan)供應商

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