高(Gao)速(Su)钢(Gang)制(Zhi)造(Zao)四(Si)大(Da)工(Gong)艺(Yi)
(?) (?)高(Gao)速(Su)钢(Gang)根(Gen)据(Ju)其(Qi)制(Zhi)备(Bei)工(Gong)艺(Yi)的(De)不(Bu)同(Tong)可(Ke)分(Fen)为(Wei)传(Chuan)统(Tong)铸(Zhu)造(Zao)技(Ji)术(Shu)、(?)电(Dian)渣(Zha)重(Zhong)熔(Rong)技(Ji)术(Shu)、(?)粉(Fen)末(Mo)冶(Ye)金(Jin)技(Ji)术(Shu)、(?)喷(Pen)射(She)成(Cheng)型(Xing)技(Ji)术(Shu)四(Si)类(Lei),(?)其(Qi)中(Zhong)传(Chuan)统(Tong)高(Gao)速(Su)钢(Gang)有(You)可(Ke)分(Fen)为(Wei)普(Pu)通(Tong)高(Gao)速(Su)钢(Gang)、(?)高(Gao)性(Xing)能(Neng)高(Gao)速(Su)钢(Gang)、(?)低(Di)合(He)金(Jin)高(Gao)速(Su)钢(Gang)等(Deng)。(?)作(Zuo)为(Wei)一(Yi)种(Zhong)高(Gao)合(He)金(Jin)莱(Lai)氏(Shi)体(Ti)钢(Gang)高(Gao)速(Su)钢(Gang)中(Zhong)的(De)碳(Tan)含(Han)量(Liang)可(Ke)超(Chao)过(Guo)1%,(?)且(Qie)其(Qi)中(Zhong)碳(Tan)化(Hua)物(Wu)的(De)种(Zhong)类(Lei)、(?)数(Shu)量(Liang)、(?)尺(Chi)寸(Cun)、(?)分(Fen)布(Bu)等(Deng)是(Shi)决(Jue)定(Ding)其(Qi)性(Xing)能(Neng)的(De)关(Guan)键(Jian)因(Yin)素(Su)。(?)因(Yin)此(Ci),(?)不(Bu)同(Tong)的(De)制(Zhi)备(Bei)工(Gong)艺(Yi)对(Dui)高(Gao)速(Su)钢(Gang)的(De)性(Xing)能(Neng)有(You)着(Zhuo)重(Zhong)要(Yao)影(Ying)响(Xiang)。(?)
(?) (?)传(Chuan)统(Tong)制(Zhi)造(Zao)技(Ji)术(Shu)
(?) (?)概(Gai)述(Shu):(?)传(Chuan)统(Tong)铸(Zhu)造(Zao)高(Gao)速(Su)钢(Gang)的(De)工(Gong)艺(Yi)简(Jian)单(Dan)、(?)成(Cheng)本(Ben)低(Di)。(?)但(Dan)由(You)于(Yu)其(Qi)凝(Ning)固(Gu)速(Su)度(Du)缓(Huan)慢(Man),(?)在(Zai)结(Jie)晶(Jing)前(Qian)形(Xing)成(Cheng)大(Da)量(Liang)碳(Tan)和(He)合(He)金(Jin)元(Yuan)素(Su)的(De)偏(Pian)析(Xi),(?)从(Cong)而(?)形(Xing)成(Cheng)晶(Jing)间(Jian)碳(Tan)化(Hua)物(Wu)网(Wang)。(?)而(?)为(Wei)了(Liao)消(Xiao)除(Chu)碳(Tan)化(Hua)物(Wu)的(De)不(Bu)均(Jun)匀(Yun)分(Fen)布(Bu),(?)采(Cai)用(Yong)高(Gao)温(Wen)反(Fan)复(Fu)锻(Duan)打(Da)或(Huo)轧(Zha)制(Zhi)使(Shi)其(Qi)破(Po)碎(Sui)并(Bing)均(Jun)匀(Yun)分(Fen)布(Bu),(?)而(?)这(Zhe)种(Zhong)锻(Duan)造(Zao)过(Guo)程(Cheng)易(Yi)造(Zao)成(Cheng)开(Kai)裂(Lie),(?)且(Qie)受(Shou)到(Dao)加(Jia)工(Gong)设(She)备(Bei)和(He)锻(Duan)压(Ya)比(Bi)的(De)限(Xian)制(Zhi)导(Dao)致(Zhi)了(Liao)高(Gao)速(Su)钢(Gang)从(Cong)铸(Zhu)锭(Ding)到(Dao)最(Zui)后(Hou)成(Cheng)品(Pin),(?)材(Cai)料(Liao)在(Zai)整(Zheng)个(Ge)过(Guo)程(Cheng)中(Zhong)的(De)利(Li)用(Yong)率(Lu)仅(Jin)在(Zai)24%-36%之(Zhi)间(Jian)。(?)
(?) (?)缺(Que)点(Dian):(?)采(Cai)用(Yong)传(Chuan)统(Tong)铸(Zhu)造(Zao)制(Zhi)备(Bei)工(Gong)艺(Yi)的(De)高(Gao)速(Su)钢(Gang)在(Zai)使(Shi)用(Yong)过(Guo)程(Cheng)中(Zhong)易(Yi)于(Yu)产(Chan)生(Sheng)应(Ying)力(Li)集(Ji)中(Zhong),(?)脆(Cui)性(Xing)大(Da),(?)韧(Ren)性(Xing)较(Jiao)差(Cha)、(?)成(Cheng)材(Cai)率(Lu)低(Di)等(Deng)缺(Que)点(Dian)。(?)
(?) (?)电(Dian)渣(Zha)重(Zhong)熔(Rong)技(Ji)术(Shu)
(?) (?)概(Gai)述(Shu):(?)电(Dian)渣(Zha)重(Zhong)熔(Rong)技(Ji)术(Shu)是(Shi)一(Yi)种(Zhong)精(Jing)炼(Lian)冶(Ye)金(Jin)技(Ji)术(Shu),(?)它(Ta)是(Shi)一(Yi)项(Xiang)重(Zhong)大(Da)的(De)冶(Ye)金(Jin)技(Ji)术(Shu)进(Jin)步(Bu),(?)尤(You)其(Qi)是(Shi)在(Zai)改(Gai)善(Shan)高(Gao)速(Su)钢(Gang)低(Di)倍(Bei)组(Zu)织(Zhi)和(He)提(Ti)高(Gao)钢(Gang)材(Cai)质(Zhi)量(Liang)方(Fang)面(Mian)效(Xiao)果(Guo)显(Xian)著(Zhu)。(?)它(Ta)是(Shi)一(Yi)种(Zhong)结(Jie)合(He)钢(Gang)液(Ye)二(?)次(Ci)精(Jing)炼(Lian)与(Yu)定(Ding)向(Xiang)凝(Ning)固(Gu)的(De)一(Yi)种(Zhong)综(Zong)合(He)冶(Ye)金(Jin)铸(Zhu)造(Zao)过(Guo)程(Cheng),(?)通(Tong)过(Guo)这(Zhe)种(Zhong)方(Fang)法(Fa)可(Ke)以(Yi)减(Jian)少(Shao)钢(Gang)液(Ye)的(De)硫(Liu)磷(Lin)含(Han)量(Liang),(?)提(Ti)高(Gao)钢(Gang)液(Ye)纯(Chun)净(Jing)度(Du),(?)改(Gai)善(Shan)钢(Gang)的(De)低(Di)倍(Bei)组(Zu)织(Zhi)。(?)由(You)于(Yu)电(Dian)渣(Zha)锭(Ding)冷(Leng)速(Su)较(Jiao)快(Kuai),(?)使(Shi)得(De)钢(Gang)中(Zhong)碳(Tan)化(Hua)物(Wu)分(Fen)布(Bu)更(Geng)加(Jia)均(Jun)匀(Yun),(?)组(Zu)织(Zhi)的(De)改(Gai)善(Shan)也(Ye)提(Ti)高(Gao)了(Liao)高(Gao)速(Su)钢(Gang)的(De)热(Re)塑(Su)性(Xing)。(?)
(?) (?)缺(Que)点(Dian):(?)尽(Jin)管(Guan)有(You)着(Zhuo)种(Zhong)种(Zhong)进(Jin)步(Bu)和(He)优(You)点(Dian),(?)电(Dian)渣(Zha)重(Zhong)熔(Rong)凝(Ning)固(Gu)速(Su)度(Du)依(Yi)然(Ran)偏(Pian)低(Di),(?)晶(Jing)粒(Li)依(Yi)然(Ran)较(Jiao)为(Wei)粗(Cu)大(Da),(?)碳(Tan)化(Hua)物(Wu)尺(Chi)寸(Cun)分(Fen)布(Bu)依(Yi)然(Ran)不(Bu)均(Jun)匀(Yun),(?)且(Qie)其(Qi)能(Neng)耗(Hao)高(Gao),(?)生(Sheng)产(Chan)效(Xiao)率(Lu)低(Di),(?)生(Sheng)产(Chan)过(Guo)程(Cheng)中(Zhong)产(Chan)生(Sheng)氟(Fu)化(Hua)物(Wu),(?)对(Dui)环(Huan)境(Jing)和(He)人(Ren)体(Ti)危(Wei)害(Hai)较(Jiao)大(Da)。(?)
(?) (?)粉(Fen)末(Mo)冶(Ye)金(Jin)技(Ji)术(Shu)
(?) (?)概(Gai)述(Shu):(?)1965 年(Nian)美(Mei)国(Guo)克(Ke)鲁(Lu)斯(Si)伯(Bo) Crucible Steels 公(Gong)司(Si)发(Fa)明(Ming)了(Liao)粉(Fen)末(Mo)冶(Ye)金(Jin)法(Fa)生(Sheng)产(Chan)高(Gao)速(Su)钢(Gang),(?)其(Qi)生(Sheng)产(Chan)工(Gong)艺(Yi)主(Zhu)要(Yao)分(Fen)为(Wei)两(Liang)个(Ge)步(Bu)骤(Zhou):(?)
(?) (?)一(Yi)、(?)气(Qi)体(Ti)雾(Wu)化(Hua)制(Zhi)粉(Fen),(?)其(Qi)基(Ji)本(Ben)原(Yuan)理(Li)是(Shi)将(Jiang)熔(Rong)融(Rong)的(De)高(Gao)速(Su)钢(Gang)经(Jing)坩(Gan)埚(?)底(Di)部(Bu)导(Dao)流(Liu)管(Guan)限(Xian)流(Liu)后(Hou),(?)以(Yi)一(Yi)定(Ding)的(De)流(Liu)速(Su)流(Liu)出(Chu),(?)用(Yong)高(Gao)压(Ya)氩(Ya)气(Qi)或(Huo)纯(Chun)氮(Dan)气(Qi)使(Shi)之(Zhi)雾(Wu)化(Hua)成(Cheng)一(Yi)定(Ding)尺(Chi)度(Du)分(Fen)布(Bu)的(De)粉(Fen)末(Mo)。(?)
(?) (?)二(?)、(?)粉(Fen)末(Mo)成(Cheng)型(Xing),(?)经(Jing)筛(Shai)分(Fen)-预(Yu)压(Ya)之(Zhi)后(Hou),(?)在(Zai)高(Gao)温(Wen)(1100摄(She)氏(Shi)度(Du))、(?)高(Gao)压(Ya)(100MPa)之(Zhi)下(Xia)热(Re)等(Deng)静(Jing)压(Ya)固(Gu)结(Jie)、(?)致(Zhi)密(Mi)化(Hua)成(Cheng)近(Jin)终(Zhong)成(Cheng)型(Xing)的(De)毛(Mao)坯(Pi)或(Huo)者(Zhe)先(Xian)制(Zhi)备(Bei)成(Cheng)钢(Gang)坯(Pi)再(Zai)经(Jing)过(Guo)机(Ji)加(Jia)工(Gong)成(Cheng)最(Zui)后(Hou)的(De)形(Xing)状(Zhuang)。(?)这(Zhe)种(Zhong)工(Gong)艺(Yi)有(You)效(Xiao)地(Di)解(Jie)决(Jue)了(Liao)一(Yi)般(Ban)熔(Rong)炼(Lian)高(Gao)速(Su)钢(Gang)时(Shi)铸(Zhu)锭(Ding)产(Chan)生(Sheng)粗(Cu)大(Da)碳(Tan)化(Hua)物(Wu)共(Gong)晶(Jing)偏(Pian)析(Xi)的(De)问(Wen)题(Ti),(?)得(De)到(Dao)细(Xi)小(Xiao)、(?)均(Jun)匀(Yun)的(De)结(Jie)晶(Jing)组(Zu)织(Zhi)。(?)
(?) (?)优(You)点(Dian):(?) 粉(Fen)末(Mo)冶(Ye)金(Jin)高(Gao)速(Su)钢(Gang)组(Zu)织(Zhi)细(Xi)小(Xiao),(?)其(Qi)强(Qiang)度(Du)和(He)韧(Ren)性(Xing)分(Fen)别(Bie)是(Shi)熔(Rong)炼(Lian)高(Gao)速(Su)钢(Gang)的(De) 2 倍(Bei)和(He) 2. 5 ~(?) 3 倍(Bei);强(Qiang)度(Du)高(Gao)热(Re)处(Chu)理(Li)尺(Chi)寸(Cun)稳(Wen)定(Ding)性(Xing)好(Hao),(?)加(Jia)工(Gong)性(Xing)能(Neng)好(Hao)、(?)硬(Ying)度(Du)高(Gao)、(?)耐(Nai)磨(Mo)性(Xing)好(Hao)。(?)高(Gao)温(Wen)热(Re)硬(Ying)度(Du)也(Ye)比(Bi)熔(Rong)炼(Lian)高(Gao)速(Su)钢(Gang)提(Ti)高(Gao) HRC1~(?) 2,(?)物(Wu)理(Li)机(Ji)械(Xie)性(Xing)能(Neng)高(Gao)度(Du)各(Ge)向(Xiang)同(Tong)性(Xing),(?)淬(Cui)火(Huo)变(Bian)形(Xing)小(Xiao); 耐(Nai)磨(Mo)性(Xing)能(Neng)提(Ti)高(Gao) 20% ~(?) 30%;热(Re)处(Chu)理(Li)成(Cheng)品(Pin)率(Lu)高(Gao)经(Jing)济(Ji)效(Xiao)益(Yi)好(Hao);成(Cheng)形(Xing)性(Xing)好(Hao),(?)在(Zai)制(Zhi)备(Bei)精(Jing)密(Mi)、(?)复(Fu)杂(Za)道(Dao)具(Ju)方(Fang)面(Mian)有(You)很(Hen)大(Da)的(De)优(You)势(Shi)。(?)
(?) (?)缺(Que)点(Dian):(?)粉(Fen)末(Mo)高(Gao)速(Su)钢(Gang)生(Sheng)产(Chan)过(Guo)程(Cheng)过(Guo)于(Yu)繁(Fan)琐(Suo),(?)工(Gong)序(Xu)长(Chang),(?)一(Yi)般(Ban)要(Yao)经(Jing)过(Guo)制(Zhi)粉(Fen)-筛(Shai)分(Fen)-压(Ya)制(Zhi)-烧(Shao)结(Jie),(?)成(Cheng)本(Ben)高(Gao)价(Jia)格(Ge)昂(Ang)贵(Gui) ;此(Ci)外(Wai)其(Qi)还(Huan)存(Cun)在(Zai)制(Zhi)备(Bei)工(Gong)艺(Yi)复(Fu)杂(Za)、(?)粉(Fen)末(Mo)氧(Yang)化(Hua)严(Yan)重(Zhong)、(?)难(Nan)以(Yi)制(Zhi)备(Bei)大(Da)块(Kuai)坯(Pi)料(Liao)等(Deng)问(Wen)题(Ti)。(?)
(?) (?)粉(Fen)末(Mo)冶(Ye)金(Jin)示(Shi)意(Yi)图(Tu):(?)
(?) (?)喷(Pen)射(She)成(Cheng)型(Xing)技(Ji)术(Shu)
(?) (?)概(Gai)述(Shu):(?)喷(Pen)射(She)成(Cheng)型(Xing)是(Shi)由(You)英(Ying)国(Guo)的(De)Swansea大(Da)学(Xue)教(Jiao)授(Shou)A.Singer于(Yu)1968年(Nian)提(Ti)出(Chu)来(Lai)的(De),(?)并(Bing)于(Yu)1974年(Nian)由(You)R.Brooks等(Deng)人(Ren)成(Cheng)功(Gong)将(Jiang)其(Qi)应(Ying)用(Yong)于(Yu)锻(Duan)造(Zao)坯(Pi)的(De)生(Sheng)产(Chan),(?)发(Fa)展(Zhan)了(Liao)著(Zhu)名(Ming)的(De)Osprey工(Gong)艺(Yi),(?)是(Shi)利(Li)用(Yong)快(Kuai)速(Su)凝(Ning)固(Gu)的(De)方(Fang)法(Fa)制(Zhi)备(Bei)高(Gao)性(Xing)能(Neng)材(Cai)料(Liao)的(De)先(Xian)进(Jin)技(Ji)术(Shu)。(?)喷(Pen)射(She)成(Cheng)型(Xing)高(Gao)速(Su)钢(Gang)也(Ye)属(Shu)于(Yu)粉(Fen)末(Mo)冶(Ye)金(Jin)高(Gao)速(Su)钢(Gang),(?)该(Gai)技(Ji)术(Shu)消(Xiao)除(Chu)了(Liao)成(Cheng)分(Fen)宏(Hong)观(Guan)偏(Pian)析(Xi)问(Wen)题(Ti),(?)具(Ju)有(You)粉(Fen)末(Mo)冶(Ye)金(Jin)的(De)组(Zu)织(Zhi)特(Te)点(Dian)。(?)。(?)
(?) (?)优(You)点(Dian):(?)喷(Pen)射(She)成(Cheng)形(Xing)工(Gong)艺(Yi)是(Shi)一(Yi)种(Zhong)融(Rong)合(He)了(Liao)传(Chuan)统(Tong)铸(Zhu)造(Zao)和(He)粉(Fen)末(Mo)冶(Ye)金(Jin)优(You)点(Dian)的(De)冶(Ye)金(Jin)技(Ji)术(Shu),(?)具(Ju)体(Ti)如(Ru)下(Xia):(?)
(?) (?)(1)组(Zu)织(Zhi)细(Xi)小(Xiao)均(Jun)匀(Yun);
(?) (?)(2)喷(Pen)射(She)成(Cheng)形(Xing)工(Gong)艺(Yi)相(Xiang)对(Dui)于(Yu)传(Chuan)统(Tong)工(Gong)艺(Yi)可(Ke)容(Rong)许(Xu)更(Geng)多(Duo)的(De)杂(Za)质(Zhi)元(Yuan)素(Su);
(?) (?)(3)工(Gong)艺(Yi)流(Liu)程(Cheng)短(Duan)、(?)成(Cheng)品(Pin)率(Lu)高(Gao)、(?)成(Cheng)本(Ben)低(Di);
(?) (?)(4)氧(Yang)化(Hua)程(Cheng)度(Du)小(Xiao)
(?) (?)缺(Que)点(Dian):(?)沉(Chen)积(Ji)态(Tai)坯(Pi)件(Jian)中(Zhong)总(Zong)有(You)一(Yi)定(Ding)量(Liang)的(De)疏(Shu)松(Song),(?)但(Dan)通(Tong)常(Chang)可(Ke)通(Tong)过(Guo)挤(Ji)压(Ya)、(?)热(Re)冷(Leng)轧(Zha)或(Huo)热(Re)等(Deng)静(Jing)压(Ya)可(Ke)达(Da)到(Dao)完(Wan)全(Quan)密(Mi)室(Shi),(?)其(Qi)最(Zui)终(Zhong)产(Chan)品(Pin)效(Xiao)率(Lu)明(Ming)显(Xian)低(Di)于(Yu)100%;材(Cai)料(Liao)损(Sun)失(Shi)来(Lai)源(Yuan)于(Yu):(?)1.熔(Rong)滴(Di)的(De)过(Guo)喷(Pen) 2.熔(Rong)滴(Di)或(Huo)颗(Ke)粒(Li) 从(Cong)坯(Pi)件(Jian)表(Biao)面(Mian)弹(Dan)开(Kai) 3.检(Jian)测(Ce)报(Bao)废(Fei)或(Huo)加(Jia)工(Gong)损(Sun)耗(Hao)以(Yi)及(Ji)坯(Pi)件(Jian)基(Ji)体(Ti)和(He)顶(Ding)部(Bu)去(Qu)除(Chu) 4.冶(Ye)金(Jin)质(Zhi)量(Liang)问(Wen)题(Ti)的(De)报(Bao)废(Fei)。(?)
(?) (?)喷(Pen)射(She)成(Cheng)型(Xing)示(Shi)意(Yi)图(Tu):(?)
(?) (?)金(Jin)属(Shu)粉(Fen)末(Mo)喷(Pen)射(She)成(Cheng)型(Xing)工(Gong)艺(Yi)流(Liu)程(Cheng)为(Wei):(?)金(Jin)属(Shu)液(Ye)雾(Wu)化(Hua)—液(Ye)滴(Di)高(Gao)速(Su)飞(Fei)行(Xing)—液(Ye)滴(Di)与(Yu)沉(Chen)淀(Dian)器(Qi)或(Huo)模(Mo)具(Ju)碰(Peng)撞(Zhuang)变(Bian)形(Xing)及(Ji)凝(Ning)固(Gu)成(Cheng)型(Xing)。(?)即(Ji)首(Shou)先(Xian)将(Jiang)粉(Fen)末(Mo)加(Jia)热(Re)成(Cheng)熔(Rong)融(Rong)的(De)金(Jin)属(Shu)液(Ye),(?)然(Ran)后(Hou)进(Jin)行(Xing)气(Qi)体(Ti)雾(Wu)化(Hua);在(Zai)气(Qi)体(Ti)射(She)流(Liu)的(De)作(Zuo)用(Yong)下(Xia),(?)液(Ye)滴(Di)加(Jia)速(Su)飞(Fei)行(Xing)并(Bing)迅(Xun)速(Su)冷(Leng)却(Que);当(Dang)高(Gao)速(Su)飞(Fei)行(Xing)的(De)液(Ye)滴(Di)在(Zai)沉(Chen)淀(Dian)器(Qi)内(Nei)碰(Peng)撞(Zhuang)时(Shi),(?)球(Qiu)形(Xing)颗(Ke)粒(Li)受(Shou)冲(Chong)击(Ji)作(Zuo)用(Yong)而(?)变(Bian)成(Cheng)扁(Bian)平(Ping)状(Zhuang),(?)形(Xing)成(Cheng)溅(Jian)射(She)片(Pian);通(Tong)过(Guo)沉(Chen)淀(Dian)器(Qi)的(De)冷(Leng)却(Que)作(Zuo)用(Yong)颗(Ke)粒(Li)迅(Xun)速(Su)凝(Ning)固(Gu),(?)并(Bing)在(Zai)自(Zi)熔(Rong)性(Xing)作(Zuo)用(Yong)下(Xia)积(Ji)聚(Ju)成(Cheng)型(Xing)。(?)
相(Xiang)关(Guan)新(Xin)闻(Wen)
服(Fu)务(Wu)热(Re)线(Xian):(?)
电(Dian)话(Hua):(?)0711-2403166
邮(You)箱(Xiang):(?) hbezzt@126.com
传(Chuan)真(Zhen):(?)0711-2403188
通(Tong)讯(Xun)地(Di)址(Zhi):(?)湖(Hu)北(Bei)省(Sheng)鄂(E)州(Zhou)市(Shi)鄂(E)城(Cheng)区(Qu)长(Chang)港(Gang)镇(Zhen)滨(Bin)港(Gang)大(Da)道(Dao)12号(Hao)
查(Cha)看(Kan)手(Shou)机(Ji)版(Ban)
Copyright 2021 鄂(E)州(Zhou)市(Shi)中(Zhong)天(Tian)环(Huan)保(Bao)设(She)备(Bei)有(You)限(Xian)公(Gong)司(Si) 版(Ban)权(Quan)所(Suo)有(You) 鄂(E)ICP备(Bei)2021006181号(Hao)
网(Wang)站(Zhan)建(Jian)设(She):(?)中(Zhong)企(Qi)动(Dong)力(Li) 武(Wu)汉(Han)二(?)分(Fen)
服(Fu)务(Wu)热(Re)线(Xian):(?)
电(Dian)话(Hua):(?)0711-2403166
邮(You)箱(Xiang):(?) hbezzt@126.com
传(Chuan)真(Zhen):(?)0711-2403188
通(Tong)讯(Xun)地(Di)址(Zhi):(?)湖(Hu)北(Bei)省(Sheng)鄂(E)州(Zhou)市(Shi)鄂(E)城(Cheng)区(Qu)长(Chang)港(Gang)镇(Zhen)滨(Bin)港(Gang)大(Da)道(Dao)12号(Hao)
Copyright 2021 鄂(E)州(Zhou)市(Shi)中(Zhong)天(Tian)环(Huan)保(Bao)设(She)备(Bei)有(You)限(Xian)公(Gong)司(Si) 版(Ban)权(Quan)所(Suo)有(You)
鄂(E)ICP备(Bei)2021006181号(Hao) 网(Wang)站(Zhan)建(Jian)设(She):(?)中(Zhong)企(Qi)动(Dong)力(Li) 武(Wu)汉(Han)二(?)分(Fen)