15865787859
q345b無縫鋼(gang)管,鑫文軒金屬材料(liao)(衡水市分(fen)公司(si))hdw7262524擁有3年行業經驗,生產的q345b無縫(feng)鋼管(guan)深受廣大客戶的好評,q345b無縫鋼管不僅僅是一個產品,更是一種責任和承諾。歡迎前來咨詢,聯系人:郝經理,地址:[經濟(ji)技術開發區(qu)匯通物流園]。 河(he)北省,衡(heng)(heng)水市 衡(heng)(heng)水市所轄冀(ji)州(zhou)為九州(zhou)之首。河(he)北省稱(cheng)冀(ji)，也(ye)緣于此，涌現出了董仲舒、孔穎(ying)達、高(gao)適、孫犁等知名人物。衡(heng)(heng)水市地(di)處河(he)北沖積平(ping)原，地(di)勢(shi)自西南向東北緩慢傾(qing)斜，海拔高(gao)度12-30米。屬大陸季(ji)風氣候區，為溫暖半干旱型(xing)(xing)。 山東鑫文軒(xuan)金屬材(cai)(cai)料有限公(gong)(gong)司(si)是(shi)一家專業(ye)銷(xiao)售(shou)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水焊(han)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水鍍(du)(du)鋅(xin)(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水鍍(du)(du)鋅(xin)(xin)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水冷彎型(xing)(xing)鋼(gang)(gang)，無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水加工定做(zuo)(zuo)各(ge)(ge)(ge)類型(xing)(xing)材(cai)(cai)質(zhi)異形(xing)(xing)(xing)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水鍍(du)(du)鋅(xin)(xin)異型(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的企業(ye)，產(chan)(chan)(chan)品(pin)主(zhu)要應用領域：建(jian)筑(zhu)鋼(gang)(gang)結(jie)構，大型(xing)(xing)場館，會展中心(xin)(xin)，升降(jiang)機(ji)械(xie)，船舶制造(zao)，倉(cang)儲貨架，裝(zhuang)飾裝(zhuang)潢，交通設施，機(ji)場建(jian)設，鐵路車(che)輛(liang)，橋梁支架，礦井支架，立體車(che)庫，戶外廣告，健身器材(cai)(cai)，風電(dian)設備，車(che)輛(liang)制造(zao)等行業(ye)。憑(ping)借(jie)優(you)良的管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)理(li)、衡(heng)(heng)水開發(fa)(fa)優(you)勢(shi)，借(jie)助超(chao)前(qian)的開發(fa)(fa)理(li)念、衡(heng)(heng)水先進的發(fa)(fa)展思(si)想以及(ji)成功(gong)的運(yun)作模式，公(gong)(gong)司(si)的規(gui)模也(ye)不(bu)斷(duan)地(di)發(fa)(fa)展壯大．公(gong)(gong)司(si)不(bu)斷(duan)進取，加快加強項目開發(fa)(fa)運(yun)作，進一步完善(shan)開發(fa)(fa)機(ji)制，強勢(shi)打(da)(da)造(zao)公(gong)(gong)司(si)的品(pin)牌效應。 所銷(xiao)售(shou)的方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)產(chan)(chan)(chan)品(pin)已(yi)經覆蓋16*16-600*600厚0.8-25的各(ge)(ge)(ge)種規(gui)格形(xing)(xing)(xing)狀方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。業(ye)務部：郝經理(li)。公(gong)(gong)司(si)目前(qian)生產(chan)(chan)(chan)銷(xiao)售(shou)的產(chan)(chan)(chan)品(pin)主(zhu)要有： 1.矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)（扁通）-無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，直縫(feng)(feng)(feng)(feng)(feng)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，熱鍍(du)(du)鋅(xin)(xin)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，鍍(du)(du)鋅(xin)(xin)帶矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，薄壁矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)（0.5-2.0mm），厚壁矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)（壁厚16-30mm），大口(kou)徑矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 600*500矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，600*400矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，500*400矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，20#無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q345矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q235矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，20#矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，不(bu)銹鋼(gang)(gang)201矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan) 2.方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(方(fang)(fang)(fang)(fang)(fang)(fang)(fang)通)-無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，直縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，熱鍍(du)(du)鋅(xin)(xin)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，鍍(du)(du)鋅(xin)(xin)帶方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，薄壁方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)（0.5-2.0mm），厚壁方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)（壁厚16-30mm），大口(kou)徑方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。600*600方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，500*500方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，400*400方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，300*300方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，20#無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q345B無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)， 低(di)合(he)金無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，16錳無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q345B無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q345B焊(han)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)， Q235B大口(kou)徑方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q235B大口(kou)徑矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，304不(bu)銹鋼(gang)(gang)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。Q345方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)， 低(di)合(he)金無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，低(di)合(he)金無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q235方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，20#方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，316不(bu)銹鋼(gang)(gang)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 3.方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)-無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，直縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q235方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，Q345方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，20#方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)， 不(bu)銹鋼(gang)(gang)304方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)；大口(kou)徑厚壁方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，冷彎方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)形(xing)(xing)(xing)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，冷彎空心(xin)(xin)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)， 冷彎空心(xin)(xin)型(xing)(xing)鋼(gang)(gang)，熱鍍(du)(du)鋅(xin)(xin)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 ★訂做(zuo)(zuo)各(ge)(ge)(ge)種材(cai)(cai)質(zhi)及(ji)非型(xing)(xing)號(hao)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)（各(ge)(ge)(ge)種異型(xing)(xing)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，非標方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)），可帶料加工。 ★高(gao)精(jing)度無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、衡(heng)(heng)水熱軋方(fang)(fang)(fang)(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)以及(ji)500*500-800*800大口(kou)徑、衡(heng)(heng)水厚壁方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)我們的主(zhu)打(da)(da)產(chan)(chan)(chan)品(pin)。 ★整合(he)優(you)勢(shi)資源，打(da)(da)造(zao)專業(ye)化產(chan)(chan)(chan)品(pin)，立志(zhi)做(zuo)(zuo)世界(jie)專業(ye)的方(fang)(fang)(fang)(fang)(fang)(fang)(fang)矩(ju)(ju)(ju)(ju)(ju)(ju)(ju)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)供應商。