振動電機_倉壁振動器專業廠家—新鄉市新久振動機械有限公司
新(xin)久公司(si)是(shi)從(cong)事振動(dong)電(dian)機、倉壁振動(dong)器、振動(dong)篩分過(guo)濾機械設備的專(zhuan)業(ye)企業(ye),咨詢熱(re)線:13937364147。
振動電機|倉壁振動器|防閉塞裝置|震動電機|振動馬達|震動器|電磁
新鄉宏達振(zhen)動(dong)電(dian)機(ji)(ji)廠主要(yao)生產(chan)振(zhen)動(dong)電(dian)機(ji)(ji),倉壁振(zhen)動(dong)器,防閉塞裝置,倉壁振(zhen)打器,振(zhen)動(dong)馬達,電(dian)磁(ci)振(zhen)動(dong)器,震動(dong)電(dian)機(ji)(ji),振(zhen)打電(dian)機(ji)(ji)等(deng)振(zhen)動(dong)機(ji)(ji)械,公司現(xian)有員(yuan)工100人,生產(chan)廠地(di)9000多。
礦用振動篩_yzo系列振動電機_倉壁振動器_振動給料機_新鄉威猛冶金
新鄉威猛(meng)冶金設備(bei)有限公司(si)是中國振動(dong)行業(ye)(ye)起步早的企(qi)業(ye)(ye)之一(yi),是專(zhuan)業(ye)(ye)生產礦用振動(dong)篩(shai),振動(dong)給料(liao)機,yzo系列振動(dong)電機,旋(xuan)振篩(shai),電磁給料(liao)機,倉(cang)壁振動(dong)器(qi),電磁倉(cang)壁振動(dong)器(qi),。
振動篩_百度百科
偏心軸直(zhi)線振動(dong)篩(shai)同(tong)步(bu)旋轉振動(dong)器三角(jiao)皮帶傳動(dong)篩(shai)分機械(xie)雙電機傳動(dong)激振力異步(bu)電機輪胎式聯軸器。
雙軸直線振動篩振動器結構的改進-《礦山機械》1975年06期
JZO振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),YZS振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),YZO振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),YZD振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),TZD振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),YZDP振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),vb振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),ZDS振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),ZDJ振(zhen)(zhen)動(dong)(dong)(dong)(dong)電(dian)(dian)機(ji)(ji)(ji)(ji)(ji),直線(xian)振(zhen)(zhen)動(dong)(dong)(dong)(dong)篩,橡膠彈(dan)簧,旋振(zhen)(zhen)篩,振(zhen)(zhen)動(dong)(dong)(dong)(dong)給料(liao)機(ji)(ji)(ji)(ji)(ji),LZF。
振動電機|振動篩|倉壁振動器|防閉塞裝置|振動平臺|振動給料機_
振(zhen)(zhen)動器(qi)(qi),倉(cang)壁振(zhen)(zhen)動器(qi)(qi),防(fang)爆倉(cang)壁振(zhen)(zhen)動器(qi)(qi)圓振(zhen)(zhen)動篩(shai),不銹鋼振(zhen)(zhen)動篩(shai),多層直(zhi)線篩(shai),直(zhi)線振(zhen)(zhen)動篩(shai),YZS振(zhen)(zhen)動電(dian)機,YZU振(zhen)(zhen)動電(dian)機,YZD振(zhen)(zhen)動電(dian)機,VB振(zhen)(zhen)動電(dian)機,倉(cang)壁振(zhen)(zhen)動器(qi)(qi),振(zhen)(zhen)動防(fang)閉塞,倉(cang)壁。
振動器倉壁振動器防爆倉壁振動器新鄉市振動設備制造有限公司
LZF防(fang)閉塞(sai)裝(zhuang)置、振動(dong)(dong)平(ping)臺、三維振動(dong)(dong)平(ping)臺、振動(dong)(dong)篩分(fen)過濾機(ji)、旋振篩、圓振動(dong)(dong)篩、直線振動(dong)(dong)篩、礦(kuang)用振動(dong)(dong)篩、倉壁振動(dong)(dong)器、ZFB振動(dong)(dong)防(fang)閉塞(sai)裝(zhuang)置、垂(chui)直提升機(ji)、螺(luo)旋輸送機(ji)等。
振動電機|宏達振動電機|倉壁振動器|新鄉市宏達振動設備有限責任公司
慣性振(zhen)動(dong)(dong)(dong)篩振(zhen)動(dong)(dong)(dong)器振(zhen)幅的(de)(de)調整(zheng),何(he)愛生(sheng),筑路機械(xie)與施工機械(xie)化。慣性振(zhen)動(dong)(dong)(dong)篩振(zhen)動(dong)(dong)(dong)器振(zhen)幅的(de)(de)調整(zheng)河北省廊坊市筑路機械(xie)廠何(he)愛生(sheng)在大(da)型攪拌站的(de)(de)物料精級配機構中,一般采(cai)用。
慣性振動篩振動器振幅的調整-《筑路機械與施工機械化》1997年第04
共找到752條符(fu)合(he)工業(ye)(ye)用(yong)(yong)振動(dong)器(qi)的查詢結果。您可以在阿里巴巴公(gong)司黃頁搜索(suo)到關于(yu)工業(ye)(ye)用(yong)(yong)振動(dong)器(qi)生(sheng)產(chan)商的工商注(zhu)冊(ce)年(nian)份、員(yuan)工人數、年(nian)營(ying)業(ye)(ye)額、信(xin)用(yong)(yong)記(ji)錄、相關工業(ye)(ye)用(yong)(yong)振動(dong)器(qi)。
工業用振動器公司_工業用振動器廠家_公司黃頁-阿里巴巴
2011年(nian)2月22日(ri)-熱門:百度新聞收(shou)錄(lu)中國振(zhen)動機械網希倫布蘭德收(shou)購ROTEX振(zhen)動篩倉壁震動器(qi)(倉壁振(zhen)動器(qi))是以振(zhen)動電機為激振(zhen)源的節能通過型產(chan)品,是靠。
USKG型振動篩使用說明書-技術總結-道客巴巴
新鄉市宏達振(zhen)(zhen)(zhen)動(dong)(dong)(dong)設(she)備有限責任公司主要生產YZS振(zhen)(zhen)(zhen)動(dong)(dong)(dong)電機(ji),YZO振(zhen)(zhen)(zhen)動(dong)(dong)(dong)電機(ji),ZDJ振(zhen)(zhen)(zhen)動(dong)(dong)(dong)電機(ji),YZD振(zhen)(zhen)(zhen)動(dong)(dong)(dong)電機(ji),JZO振(zhen)(zhen)(zhen)動(dong)(dong)(dong)電機(ji),VB振(zhen)(zhen)(zhen)動(dong)(dong)(dong)電機(ji),防(fang)閉塞裝置(zhi),倉壁振(zhen)(zhen)(zhen)動(dong)(dong)(dong)器等振(zhen)(zhen)(zhen)動(dong)(dong)(dong)設(she)備。
倉壁振動器的研究及應用發展-技術動態-技術支持-中國振動機械網
2012年(nian)5月(yue)15日(ri)-振(zhen)動(dong)(dong)(dong)篩一(yi)(yi)般由(you)振(zhen)動(dong)(dong)(dong)器(qi)(qi)、篩箱、支承或懸掛裝(zhuang)置(zhi)、傳動(dong)(dong)(dong)裝(zhuang)置(zhi)等部(bu)分(fen)(fen)組成。振(zhen)動(dong)(dong)(dong)器(qi)(qi)單(dan)軸振(zhen)動(dong)(dong)(dong)篩和雙軸振(zhen)動(dong)(dong)(dong)篩的振(zhen)動(dong)(dong)(dong)器(qi)(qi),按偏心重(zhong)配置(zhi)方(fang)式(shi)(shi)區分(fen)(fen)一(yi)(yi)般有兩(liang)種(zhong)型式(shi)(shi)。
YZD振動電機,YZS振動電機,YZO振動電機,JZO振動電機專業生產廠家-
新鄉亞(ya)新振(zhen)(zhen)動專(zhuan)業生(sheng)產振(zhen)(zhen)動電機,倉壁振(zhen)(zhen)動器,振(zhen)(zhen)動平臺等設備的專(zhuan)業廠(chang)家,深受廣大(da)用戶的好評,歡迎選購。
振動篩的相關知識-新聞-九正建材網(中國建材網)
:產品性(xing)能:倉壁振器又稱防閉塞裝置,用來使料(liao)倉、料(liao)罐或料(liao)斗漏(lou)料(liao)段振動(dong)平臺、振動(dong)電機、振動(dong)器、振動(dong)盤、振動(dong)篩:該設備廣泛(fan)的(de)使用在。
振動電機,倉壁振動器,振動平臺_新鄉亞新振動機械有限公司
圓振(zhen)動(dong)篩(shai)振(zhen)動(dong)器(qi)安裝(zhuang)在篩(shai)箱側(ce)(ce)板(ban)上,圓振(zhen)動(dong)篩(shai)側(ce)(ce)板(ban)與橫梁(liang)、激振(zhen)器(qi)底座采用高強度螺栓或環槽鉚(liu)釘連接,圓振(zhen)動(dong)篩(shai)并由電動(dong)機(ji)(ji)通(tong)過三(san)角皮帶(dai)帶(dai)動(dong)旋轉,圓振(zhen)動(dong)篩(shai)篩(shai)機(ji)(ji)側(ce)(ce)板(ban)采用。
振動器相關產品-007商務站-全球網上貿易平臺-第1頁
對振動(dong)篩進行改造(zao)成為推進佛(fo)山振動(dong)器工藝技術,對標工程、提升陽(yang)極質量(liang)的(de)現實需要。佛(fo)山市飛雀振動(dong)器有限公司按照“非常時(shi)期、非常措施、非常狀態”的(de)基(ji)本要求,面對受。
振動器軸承對振動篩性能的影響_百度文庫
工(gong)藝(yi)、工(gong)況中(zhong),三軸(zhou)箱(xiang)式振(zhen)動器在篩(shai)箱(xiang)中(zhong)安裝位(wei)置和傳動同步(bu)結構(gou)方式問題(ti),同時也解決傳統直線(xian)篩(shai)和圓篩(shai)在篩(shai)分作業(ye)中(zhong)物料運輸和透篩(shai)不兼容問題(ti)。整體振(zhen)動篩(shai)由振(zhen)動器、篩(shai)。
空氣振動器-振動器
共成振(zhen)(zhen)動(dong)篩(shai)公司是一(yi)家集設(she)計、生產(chan)、銷售于一(yi)體的專業給料(liao)機,振(zhen)(zhen)動(dong)平臺(tai),超聲波振(zhen)(zhen)動(dong)篩(shai),倉壁振(zhen)(zhen)動(dong)器(qi),下料(liao)器(qi),卸料(liao)閥(fa),振(zhen)(zhen)動(dong)篩(shai),直線(xian)振(zhen)(zhen)動(dong)篩(shai),旋振(zhen)(zhen)篩(shai),試(shi)驗篩(shai),振(zhen)(zhen)動(dong)平臺(tai)等(deng)。
圓振動篩的振動器安裝工藝_南通海菱磁粉制動器制造有限公司
對不(bu)起(qi),沒(mei)有(you)找到"女用振(zhen)(zhen)動(dong)器"的企業。您(nin)可以發布詢價(jia)單,讓供應商聯(lian)系您(nin)以下是為你推(tui)薦的企業:振(zhen)(zhen)動(dong)設備有(you)限公司駐烏魯木齊辦事處主營:振(zhen)(zhen)動(dong)篩,振(zhen)(zhen)動(dong)電機,。
佛山振動器|振動器廠_佛山市飛雀振動器有限公司
電磁振(zhen)動(dong)(dong)(dong)器-電磁振(zhen)動(dong)(dong)(dong)器是高效(xiao)、節能振(zhen)動(dong)(dong)(dong)器,可(ke)用于各(ge)種振(zhen)動(dong)(dong)(dong)機械,如給料機,小型輸(shu)送機,振(zhen)動(dong)(dong)(dong)篩,振(zhen)動(dong)(dong)(dong)平臺及倉壁(bi)振(zhen)動(dong)(dong)(dong)等等場合。
:三軸箱式振動器橢圓振動篩
倉壁振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)器(qi)礦用(yong)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)篩振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)電機(ji)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)篩圓(yuan)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)篩振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)直線篩_倉壁振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)器(qi)礦用(yong)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)篩振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)電機(ji)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)篩圓(yuan)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)篩振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)直線篩價(jia)格_倉壁振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)器(qi)礦用(yong)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)動(dong)(dong)。
鎖氣閥_回轉下料器_給料機_振動平臺_超聲波振動篩_倉壁振動器_關
振(zhen)動(dong)(dong)電(dian)(dian)機設備專業生產振(zhen)動(dong)(dong)電(dian)(dian)機(震(zhen)動(dong)(dong)電(dian)(dian)機)、YZO振(zhen)動(dong)(dong)電(dian)(dian)機(震(zhen)動(dong)(dong)電(dian)(dian)機)、防爆振(zhen)動(dong)(dong)電(dian)(dian)機、倉壁振(zhen)動(dong)(dong)器,為客戶提供的咨(zi)詢(xun)、安裝、指(zhi)導等服務。
女用振動器廠家企業大全_女用振動器企業黃頁集合_女用振動器生產
明科牌(pai)(振(zhen)動電(dian)機(ji),振(zhen)動平臺,倉壁振(zhen)動器,激振(zhen)器,震(zhen)動電(dian)機(ji),礦用(yong)振(zhen)動篩(shai))各種型號供您選擇。0373-2513277。
電磁振動器_互動百科
圓振(zhen)(zhen)(zhen)動(dong)篩(shai)(shai)(圓振(zhen)(zhen)(zhen)篩(shai)(shai))做圓形運動(dong),是一種多(duo)層(ceng)數、高效(xiao)新型振(zhen)(zhen)(zhen)動(dong)篩(shai)(shai)。圓振(zhen)(zhen)(zhen)動(dong)篩(shai)(shai)采用(yong)筒體式偏(pian)心軸(zhou)激振(zhen)(zhen)(zhen)器及偏(pian)塊調節振(zhen)(zhen)(zhen)幅,物料篩(shai)(shai)淌線長,篩(shai)(shai)分規格多(duo),具有結(jie)構可靠、激振(zhen)(zhen)(zhen)力強。
倉壁振動器礦用振動篩振動電機振動篩圓振動篩振動直線篩
技術(shu)文獻振(zhen)動(dong)篩技術(shu)振(zhen)動(dong)篩使用(yong)常識更(geng)多;;新鄉震動(dong)電(dian)機(ji)行業面臨(lin)聲明轉折期(qi),混(hun)凝土(tu)附(fu)著式振(zhen)動(dong)器(qi)種類改革要完(wan)善(shan)新鄉振(zhen)搗器(qi)專業生產制(zhi)造(zao)商技術(shu)簡介(jie):高頻振(zhen)動(dong)器(qi)。
振動電機|震動電機|防爆振動電機|倉壁振動器—新鄉市振動電機設備
行業知名企(qi)業宏達(da)振(zhen)(zhen)動(dong),專業生(sheng)產振(zhen)(zhen)動(dong)電機(ji)倉壁振(zhen)(zhen)動(dong)器振(zhen)(zhen)動(dong)給料機(ji)振(zhen)(zhen)動(dong)篩(shai)旋振(zhen)(zhen)篩(shai)振(zhen)(zhen)動(dong)平臺等13303733669。
振動電機,振動平臺,倉壁振動器,激振器,震動電機-新鄉鳳泉新源振動
2009年7月(yue)7日-直線(xian)振(zhen)動(dong)(dong)篩的(de)振(zhen)動(dong)(dong)器(qi)(qi)為雙軸(zhou),其結構(gou)形式(shi)有箱式(shi)振(zhen)動(dong)(dong)器(qi)(qi)(塊(kuai)(kuai)偏心(xin))、筒式(shi)振(zhen)動(dong)(dong)器(qi)(qi)(軸(zhou)偏心(xin)),以(yi)及偏心(xin)塊(kuai)(kuai)式(shi)振(zhen)動(dong)(dong)器(qi)(qi)(中間用(yong)萬向節(jie)傳動(dong)(dong)軸(zhou)聯(lian)接,類似YK型圓振(zhen)動(dong)(dong)篩)。
常用圓形振動篩的結構組成和運轉機理/-已
[圖文(wen)]該振(zhen)動(dong)(dong)篩(shai)的(de)運動(dong)(dong)由(you)電(dian)機通(tong)過三角膠帶驅動(dong)(dong)具有偏心質量的(de)振(zhen)動(dong)(dong)器,而使(shi)篩(shai)箱產生振(zhen)動(dong)(dong),篩(shai)箱的(de)運動(dong)(dong)軌跡(ji)為圓(yuan)形(xing)。該振(zhen)動(dong)(dong)篩(shai)由(you)篩(shai)箱、振(zhen)動(dong)(dong)器、彈簧減振(zhen)裝(zhuang)置和支承底架等(deng)組成。
振動電機_早通過CCC質量認證的振動電機廠家
主營產(chan)品:直線振動(dong)篩振動(dong)電(dian)機(ji)糧食清選機(ji)提升機(ji)輸(shu)送機(ji)執照已(yi)審核(he)由兩臺電(dian)動(dong)機(ji)以萬向聯(lian)軸(zhou)器(qi)帶動(dong)兩串振動(dong)器(qi)做反向自同步運轉,使篩箱(xiang)產(chan)生較(jiao)大振幅。
倉壁振動器-新鄉市宏達振動設備有限責任公司|官方
新鄉鼎(ding)豐是(shi)一家(jia)專業生產振(zhen)(zhen)動篩設備的新鄉企業,旗(qi)下經(jing)營有螺旋輸送機(ji)、振(zhen)(zhen)動電(dian)機(ji)(微型)、倉壁振(zhen)(zhen)動器以及震動篩和旋振(zhen)(zhen)篩、檢驗(yan)篩、滾(gun)筒篩、斗式提(ti)升機(ji)等(deng)產品。
機械設備專家分析振動篩的組成及作用-振動篩,動力裝置-工程
鶴壁市億通(tong)通(tong)用機(ji)(ji)(ji)械有限公司(si)(si)主導產品有振(zhen)動(dong)給(gei)料機(ji)(ji)(ji),倉壁振(zhen)動(dong)器(qi),圓(yuan)振(zhen)篩,振(zhen)動(dong)放礦機(ji)(ji)(ji),往(wang)復式給(gei)煤機(ji)(ji)(ji),星型葉輪(lun)給(gei)料機(ji)(ji)(ji)等,我(wo)司(si)(si)產品質量保(bao)證,歡迎您致(zhi)電(dian)0392—2625389。
YA型圓振動篩使用說明(一)_中國選礦技術網
我(wo)公司主要生產YZS振(zhen)動電(dian)機(ji)(ji),YZO振(zhen)動電(dian)機(ji)(ji),ZDJ振(zhen)動電(dian)機(ji)(ji),YZD振(zhen)動電(dian)機(ji)(ji),JZO振(zhen)動電(dian)機(ji)(ji),VB振(zhen)動電(dian)機(ji)(ji),防閉塞裝置(zhi),倉壁振(zhen)動器,振(zhen)動平臺,振(zhen)動篩等(deng)振(zhen)動設備,廠家價格,質量(liang),。
礦用篩振動篩_機械及行業設備_世界工廠網
2009年9月9日-目(mu)前慣性振(zhen)動(dong)(dong)(dong)篩(shai)常見的有單層(ceng)、雙層(ceng),座式(shi)(shi)和吊(diao)式(shi)(shi)之分(fen)。目(mu)前慣性振(zhen)動(dong)(dong)(dong)篩(shai)常見的有單層(ceng)、雙層(ceng),座式(shi)(shi)和吊(diao)式(shi)(shi)之分(fen)。座式(shi)(shi)振(zhen)動(dong)(dong)(dong)篩(shai)由篩(shai)箱、振(zhen)動(dong)(dong)(dong)器、板彈簧組(zu)。
振動篩_新鄉振動篩_螺旋輸送機_振動電機_旋振篩_倉壁振動器_震動
附(fu)著式振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)器,又稱(cheng)平板式振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)器,表面振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)器,廣泛用(yong)于建筑(zhu)工程中混凝土或(huo)土壤我廠主要生產:振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)篩(shai)分(fen)機、振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)給料機、振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)輸送機、振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)破磨機、振(zhen)(zhen)(zhen)(zhen)動(dong)(dong)(dong)混合機。
振動給料機_倉壁振動器_圓振篩_振動放礦機_往復式給煤機_星型葉輪
振(zhen)動(dong)篩,直線振(zhen)動(dong)篩,搖擺(bai)篩,氣流篩,高頻(pin)振(zhen)動(dong)篩,高頻(pin)振(zhen)動(dong)電(dian)機(ji)新鄉市鼎豐專業(ye)振(zhen)動(dong)機(ji)械有限(xian)公司(原新鄉市專業(ye)振(zhen)動(dong)機(ji)械廠(chang))是(shi)生產振(zhen)動(dong)篩分設備的(de)專業(ye)企(qi)業(ye),公司坐落。
振動電機_新鄉市宏達振動設備有限責任公司
海安(an)縣藍天機(ji)(ji)(ji)(ji)(ji)電(dian)制(zhi)造有(you)限公司(si)具(ju)有(you)中(zhong)等規模的機(ji)(ji)(ji)(ji)(ji)械加(jia)工制(zhi)造企(qi)業,擅長于振(zhen)(zhen)動(dong)電(dian)機(ji)(ji)(ji)(ji)(ji)、振(zhen)(zhen)動(dong)機(ji)(ji)(ji)(ji)(ji)械、倉壁(bi)振(zhen)(zhen)動(dong)器的生產和加(jia)工。公司(si)主要產品有(you)振(zhen)(zhen)動(dong)電(dian)機(ji)(ji)(ji)(ji)(ji)、ZG型振(zhen)(zhen)動(dong)電(dian)機(ji)(ji)(ji)(ji)(ji)、振(zhen)(zhen)動(dong)機(ji)(ji)(ji)(ji)(ji)械。