久久久久国产精品美女三级片,精品人妻少妇一级毛片免费,精品久久久噜噜噜久久久app,亚洲日本va中文字幕线,国产精品国产免费无码专区不卡,乱伦激情网

YTC890便(Bian)携(Xie)式(Shi)超(Chao)声(Sheng)波(Bo)地(Di)电(Dian)波(Bo)局(Ju)部(Bu)放(Fang)电(Dian)检(Jian)测(Ce)仪(Yi)

        YTC890超(Chao)声(Sheng)波(Bo)地(Di)电(Dian)波(Bo)局(Ju)部(Bu)放(Fang)电(Dian)检(Jian)测(Ce)仪(Yi)可(Ke)以(Yi)用(Yong)来(Lai)快(Kuai)速(Su)检(Jian)测(Ce)开(Kai)关(Guan)柜(Gui)、(?)环(Huan)网(Wang)柜(Gui)等(Deng)高(Gao)压(Ya)电(Dian)器(Qi)设(She)备(Bei)的(De)局(Ju)部(Bu)放(Fang)电(Dian)现(Xian)象(Xiang),(?)可(Ke)以(Yi)在(Zai)不(Bu)影(Ying)响(Xiang)开(Kai)关(Guan)柜(Gui)的(De)运(Yun)行(Xing)状(Zhuang)态(Tai)下(Xia)带(Dai)电(Dian)测(Ce)量(Liang),(?)采(Cai)用(Yong)非(Fei)入(Ru)侵(Qin)式(Shi)检(Jian)测(Ce),(?)以(Yi)超(Chao)声(Sheng)波(Bo)检(Jian)测(Ce)法(Fa)为(Wei)基(Ji)础(Chu)进(Jin)行(Xing)定(Ding)位(Wei)。(?)
       -定(Ding)位(Wei)准(Zhun)确(Que)
       -判(Pan)断(Duan)强(Qiang)度(Du)
       -效(Xiao)率(Lu)较(Jiao)高(Gao)
       -范(Fan)围(Wei)广(Guang)泛(Fan)
       -使(Shi)用(Yong)便(Bian)捷(Jie)
提(Ti)示(Shi):(?)凡(Fan)购(Gou)买(Mai)本(Ben)产(Chan)品(Pin)的(De)全(Quan)国(Guo)用(Yong)户(Hu)享(Xiang)受(Shou)免(Mian)费(Fei)技(Ji)术(Shu)指(Zhi)导(Dao)、(?)三(San)月(Yue)包(Bao)换(Huan)、(?)软(Ruan)件(Jian)升(Sheng)级(Ji)、(?)终(Zhong)生(Sheng)维(Wei)修(Xiu)服(Fu)务(Wu)。(?) 13317108516027-878765853027182076719388481
产(Chan)品(Pin)图(Tu)集(Ji) 操(Cao)作(Zuo)手(Shou)册(Ce) 产(Chan)品(Pin)视(Shi)频(Pin)
产(Chan)品(Pin)简(Jian)介(Jie) PRODUCT INTRODUCTION

产(Chan)品(Pin)简(Jian)介(Jie):(?)
        开(Kai)关(Guan)柜(Gui)、(?)环(Huan)网(Wang)柜(Gui)等(Deng)发(Fa)生(Sheng)绝(Jue)缘(Yuan)故(Gu)障(Zhang)的(De)原(Yuan)因(Yin)85%是(Shi)由(You)局(Ju)部(Bu)放(Fang)电(Dian)引(Yin)起(Qi)的(De),(?)10KV开(Kai)关(Guan)柜(Gui)、(?)环(Huan)网(Wang)柜(Gui)等(Deng)作(Zuo)为(Wei)配(Pei)网(Wang)系(Xi)统(Tong)中(Zhong)主(Zhu)要(Yao)设(She)备(Bei)之(Zhi)一(Yi),(?)其(Qi)安(An)全(Quan)性(Xing)及(Ji)可(Ke)靠(Kao)性(Xing)得(De)到(Dao)了(Liao)很(Hen)高(Gao)的(De)重(Zhong)视(Shi)。(?)对(Dui)高(Gao)压(Ya)开(Kai)关(Guan)柜(Gui)进(Jin)行(Xing)绝(Jue)缘(Yuan)性(Xing)能(Neng)检(Jian)测(Ce)与(Yu)故(Gu)障(Zhang)诊(Zhen)断(Duan),(?)是(Shi)保(Bao)证(Zheng)设(She)备(Bei)安(An)全(Quan)可(Ke)靠(Kao)运(Yun)行(Xing)的(De)关(Guan)键(Jian)。(?)
        YTC890超(Chao)声(Sheng)波(Bo)地(Di)电(Dian)波(Bo)局(Ju)部(Bu)放(Fang)电(Dian)检(Jian)测(Ce)仪(Yi)采(Cai)用(Yong)超(Chao)声(Sheng)波(Bo)检(Jian)测(Ce)法(Fa)及(Ji)暂(Zan)态(Tai)地(Di)电(Dian)波(Bo)检(Jian)测(Ce)法(Fa)进(Jin)行(Xing)检(Jian)测(Ce),(?)当(Dang)高(Gao)压(Ya)电(Dian)器(Qi)设(She)备(Bei)内(Nei)部(Bu)存(Cun)在(Zai)局(Ju)部(Bu)放(Fang)电(Dian),(?)在(Zai)放(Fang)电(Dian)过(Guo)程(Cheng)中(Zhong),(?)随(Sui)着(Zhuo)放(Fang)电(Dian)的(De)发(Fa)生(Sheng),(?)伴(Ban)随(Sui)爆(Bao)裂(Lie)状(Zhuang)的(De)声(Sheng)发(Fa)射(She),(?)产(Chan)生(Sheng)超(Chao)声(Sheng)波(Bo),(?)且(Qie)很(Hen)快(Kuai)的(De)向(Xiang)四(Si)周(Zhou)介(Jie)质(Zhi)传(Chuan)播(Bo)。(?)伴(Ban)随(Sui)有(You)声(Sheng)波(Bo)能(Neng)量(Liang)的(De)放(Fang)出(Chu),(?)超(Chao)声(Sheng)波(Bo)信(Xin)号(Hao)以(Yi)某(Mou)一(Yi)速(Su)度(Du)通(Tong)过(Guo)不(Bu)同(Tong)介(Jie)质(Zhi)((?)隔(Ge)板(Ban)、(?)油(You)、(?)SF6气(Qi)体(Ti)等(Deng))(?)以(Yi)球(Qiu)面(Mian)波(Bo)的(De)形(Xing)式(Shi)向(Xiang)四(Si)周(Zhou)传(Chuan)播(Bo)。(?)由(You)于(Yu)超(Chao)声(Sheng)波(Bo)频(Pin)率(Lu)高(Gao)其(Qi)波(Bo)长(Chang)较(Jiao)短(Duan),(?)因(Yin)此(Ci)它(Ta)的(De)方(Fang)向(Xiang)性(Xing)较(Jiao)强(Qiang),(?)从(Cong)而(?)它(Ta)的(De)能(Neng)量(Liang)较(Jiao)为(Wei)集(Ji)中(Zhong),(?)容(Rong)易(Yi)进(Jin)行(Xing)定(Ding)位(Wei)。(?)
        当(Dang)局(Ju)部(Bu)放(Fang)电(Dian)活(Huo)动(Dong)出(Chu)现(Xian)在(Zai)高(Gao)压(Ya)开(Kai)关(Guan)柜(Gui)绝(Jue)缘(Yuan)层(Ceng)中(Zhong)时(Shi),(?)它(Ta)会(Hui)产(Chan)生(Sheng)无(Wu)线(Xian)电(Dian)频(Pin)率(Lu)范(Fan)围(Wei)内(Nei)的(De)电(Dian)磁(Ci)波(Bo),(?)它(Ta)通(Tong)过(Guo)金(Jin)属(Shu)外(Wai)壳(Ke)上(Shang)的(De)开(Kai)孔(Kong),(?)从(Cong)开(Kai)关(Guan)柜(Gui)内(Nei)泄(Xie)漏(Lou)到(Dao)外(Wai)表(Biao)面(Mian)。(?)当(Dang)电(Dian)磁(Ci)波(Bo)传(Chuan)播(Bo)到(Dao)开(Kai)关(Guan)柜(Gui)外(Wai)面(Mian)时(Shi),(?)它(Ta)会(Hui)在(Zai)接(Jie)地(Di)的(De)金(Jin)属(Shu)外(Wai)壳(Ke)上(Shang)产(Chan)生(Sheng)瞬(Shun)态(Tai)地(Di)电(Dian)压(Ya),(?)亦(Yi)称(Cheng)暂(Zan)态(Tai)地(Di)电(Dian)波(Bo)(TEV)。(?)
        YTC890便(Bian)携(Xie)式(Shi)超(Chao)声(Sheng)波(Bo)地(Di)电(Dian)波(Bo)局(Ju)部(Bu)放(Fang)电(Dian)检(Jian)测(Ce)仪(Yi)采(Cai)用(Yong)云(Yun)计(Ji)算(Suan)和(He)智(Zhi)能(Neng)建(Jian)模(Mo)技(Ji)术(Shu),(?)实(Shi)现(Xian)了(Liao)局(Ju)部(Bu)放(Fang)电(Dian)信(Xin)号(Hao)的(De)测(Ce)量(Liang)、(?)记(Ji)录(Lu)、(?)传(Chuan)输(Shu)、(?)存(Cun)储(Chu)、(?)分(Fen)析(Xi)和(He)交(Jiao)换(Huan),(?)为(Wei)局(Ju)部(Bu)放(Fang)电(Dian)的(De)现(Xian)场(Chang)测(Ce)量(Liang)提(Ti)供(Gong)了(Liao)强(Qiang)大(Da)的(De)技(Ji)术(Shu)支(Zhi)撑(Cheng)。(?)测(Ce)量(Liang)人(Ren)员(Yuan)利(Li)用(Yong)YTC890采(Cai)集(Ji)局(Ju)部(Bu)放(Fang)电(Dian)信(Xin)息(Xi),(?)通(Tong)过(Guo)云(Yun)计(Ji)算(Suan)可(Ke)实(Shi)时(Shi)对(Dui)检(Jian)测(Ce)设(She)备(Bei)绝(Jue)缘(Yuan)状(Zhuang)态(Tai)进(Jin)行(Xing)智(Zhi)能(Neng)诊(Zhen)断(Duan)。(?)

系(Xi)统(Tong)功(Gong)能(Neng)
基(Ji)本(Ben)功(Gong)能(Neng)((?)检(Jian)测(Ce)仪(Yi))(?)
超(Chao)声(Sheng)波(Bo)检(Jian)测(Ce):(?)带(Dai)电(Dian)连(Lian)续(Xu)测(Ce)量(Liang)中(Zhong)高(Gao)压(Ya)设(She)备(Bei)局(Ju)部(Bu)放(Fang)电(Dian)超(Chao)声(Sheng)波(Bo);(?)
地(Di)电(Dian)波(Bo)检(Jian)测(Ce):(?)带(Dai)电(Dian)连(Lian)续(Xu)测(Ce)量(Liang)中(Zhong)高(Gao)压(Ya)设(She)备(Bei)同(Tong)部(Bu)放(Fang)电(Dian)地(Di)电(Dian)波(Bo);(?)
音(Yin)频(Pin)检(Jian)测(Ce):(?)使(Shi)用(Yong)耳(?)机(Ji)检(Jian)测(Ce)中(Zhong)高(Gao)压(Ya)设(She)备(Bei)局(Ju)部(Bu)放(Fang)电(Dian)活(Huo)动(Dong);(?)
背(Bei)景(Jing)噪(Zao)声(Sheng):(?)可(Ke)独(Du)立(Li)检(Jian)测(Ce)中(Zhong)高(Gao)压(Ya)设(She)备(Bei)的(De)背(Bei)景(Jing)噪(Zao)声(Sheng)水(Shui)平(Ping);(?)
数(Shu)值(Zhi)显(Xian)示(Shi):(?)实(Shi)时(Shi)显(Xian)示(Shi)超(Chao)声(Sheng)波(Bo)水(Shui)平(Ping)、(?)频(Pin)谌(Chen)特(Te)性(Xing)或(Huo)地(Di)电(Dian)波(Bo)水(Shui)平(Ping);(?)
波(Bo)形(Xing)显(Xian)示(Shi):(?)实(Shi)时(Shi)显(Xian)示(Shi)超(Chao)声(Sheng)波(Bo)水(Shui)平(Ping)、(?)频(Pin)谌(Chen)特(Te)性(Xing)或(Huo)地(Di)电(Dian)波(Bo)水(Shui)平(Ping)变(Bian)化(Hua)曲(Qu)线(Xian);(?)
记(Ji)录(Lu)与(Yu)回(Hui)放(Fang):(?)实(Shi)时(Shi)记(Ji)录(Lu)并(Bing)保(Bao)存(Cun)测(Ce)量(Liang)信(Xin)号(Hao),(?)方(Fang)便(Bian)信(Xin)号(Hao)回(Hui)放(Fang);(?)
智(Zhi)能(Neng)诊(Zhen)断(Duan):(?)智(Zhi)能(Neng)平(Ping)价(Jia)局(Ju)部(Bu)放(Fang)电(Dian)状(Zhuang)态(Tai),(?)并(Bing)显(Xian)示(Shi)红(Hong)绿(Lu)灯(Deng)警(Jing)报(Bao);(?)
设(She)备(Bei)管(Guan)理(Li):(?)支(Zhi)持(Chi)企(Qi)业(Ye)设(She)备(Bei)管(Guan)理(Li)系(Xi)统(Tong)接(Jie)口(Kou),(?)方(Fang)便(Bian)测(Ce)量(Liang)数(Shu)据(Ju)管(Guan)理(Li);(?)
工(Gong)作(Zuo)模(Mo)式(Shi):(?)可(Ke)工(Gong)作(Zuo)在(Zai)单(Dan)机(Ji)模(Mo)式(Shi)或(Huo)联(Lian)网(Wang)模(Mo)式(Shi),(?)支(Zhi)持(Chi)3G无(Wu)线(Xian)通(Tong)信(Xin);(?)
自(Zi)动(Dong)联(Lian)网(Wang):(?)通(Tong)过(Guo)设(She)置(Zhi)有(You)效(Xiao)用(Yong)户(Hu)信(Xin)息(Xi),(?)自(Zi)动(Dong)登(Deng)录(Lu)云(Yun)计(Ji)算(Suan)平(Ping)台(Tai);(?)
系(Xi)统(Tong)升(Sheng)级(Ji):(?)通(Tong)过(Guo)存(Cun)储(Chu)卡(Ka)或(Huo)3G网(Wang)络(Luo)实(Shi)现(Xian)系(Xi)统(Tong)软(Ruan)件(Jian)自(Zi)动(Dong)升(Sheng)级(Ji);(?)
用(Yong)户(Hu)交(Jiao)互(Hu):(?)良(Liang)好(Hao)的(De)用(Yong)户(Hu)操(Cao)作(Zuo)界(Jie)直(Zhi),(?)操(Cao)作(Zuo)简(Jian)便(Bian),(?)入(Ru)门(Men)轻(Qing)松(Song);(?)

高(Gao)级(Ji)功(Gong)能(Neng)((?)云(Yun)计(Ji)算(Suan))(?)
海(Hai)量(Liang)存(Cun)储(Chu):(?)通(Tong)过(Guo)检(Jian)测(Ce)终(Zhong)端(Duan)自(Zi)动(Dong)存(Cun)储(Chu)或(Huo)手(Shou)动(Dong)上(Shang)传(Chuan)检(Jian)测(Ce)数(Shu)据(Ju);(?)
数(Shu)据(Ju)查(Cha)询(Xun):(?)提(Ti)供(Gong)多(Duo)种(Zhong)数(Shu)据(Ju)查(Cha)询(Xun)方(Fang)式(Shi),(?)方(Fang)便(Bian)用(Yong)户(Hu)管(Guan)理(Li);(?)
数(Shu)据(Ju)分(Fen)析(Xi):(?)提(Ti)供(Gong)横(Heng)向(Xiang)和(He)纵(Zong)向(Xiang)多(Duo)种(Zhong)分(Fen)析(Xi)方(Fang)式(Shi),(?)并(Bing)自(Zi)动(Dong)生(Sheng)成(Cheng)检(Jian)测(Ce)报(Bao)表(Biao);(?)
数(Shu)据(Ju)交(Jiao)换(Huan):(?)允(Yun)许(Xu)不(Bu)同(Tong)有(You)效(Xiao)用(Yong)户(Hu)之(Zhi)间(Jian)进(Jin)行(Xing)数(Shu)据(Ju)交(Jiao)换(Huan);(?)
数(Shu)据(Ju)共(Gong)享(Xiang):(?)允(Yun)许(Xu)不(Bu)同(Tong)有(You)效(Xiao)用(Yong)户(Hu)之(Zhi)间(Jian)共(Gong)享(Xiang)数(Shu)据(Ju)源(Yuan)和(He)知(Zhi)识(Shi)库(Ku);(?)
知(Zhi)识(Shi)管(Guan)理(Li):(?)可(Ke)建(Jian)立(Li)局(Ju)部(Bu)放(Fang)电(Dian)特(Te)征(Zheng)知(Zhi)识(Shi)库(Ku),(?)便(Bian)于(Yu)知(Zhi)识(Shi)的(De)积(Ji)累(Lei)和(He)传(Chuan)承(Cheng);(?)
智(Zhi)能(Neng)诊(Zhen)断(Duan):(?)基(Ji)于(Yu)知(Zhi)识(Shi)库(Ku)评(Ping)价(Jia)局(Ju)部(Bu)放(Fang)电(Dian)状(Zhuang)态(Tai)并(Bing)选(Xuan)择(Ze)检(Jian)修(Xiu)策(Ce)略(Lue);(?)
数(Shu)据(Ju)安(An)全(Quan):(?)提(Ti)供(Gong)存(Cun)储(Chu)卡(Ka)与(Yu)云(Yun)计(Ji)算(Suan)的(De)数(Shu)据(Ju)同(Tong)步(Bu)和(He)加(Jia)密(Mi)备(Bei)份(Fen),(?)保(Bao)障(Zhang)安(An)全(Quan);(?)
设(She)备(Bei)台(Tai)账(Zhang):(?)建(Jian)立(Li)统(Tong)一(Yi)的(De)设(She)备(Bei)参(Can)数(Shu);跟(Gen)踪(Zong)设(She)备(Bei)状(Zhuang)态(Tai);(?)
专(Zhuan)家(Jia)在(Zai)线(Xian):(?)提(Ti)供(Gong)专(Zhuan)家(Jia)网(Wang)络(Luo)在(Zai)线(Xian)指(Zhi)导(Dao)诊(Zhen)断(Duan)设(She)备(Bei)状(Zhuang)态(Tai);(?)
产(Chan)品(Pin)特(Te)征(Zheng) PRODUCT FEATURES

技(Ji)术(Shu)参(Can)数(Shu) TECHNICAL PARAMETERS

项(Xiang)目(Mu) 技(Ji)术(Shu)参(Can)数(Shu)
超(Chao)声(Sheng)波(Bo)参(Can)数(Shu) 测(Ce)量(Liang)范(Fan)围(Wei) -20dBμV~65dBμV
分(Fen)辨(Bian)率(Lu) 1dB
精(Jing)度(Du) ±1dB
传(Chuan)感(Gan)器(Qi)灵(Ling)敏(Min)度(Du) -65dB
传(Chuan)感(Gan)器(Qi)中(Zhong)心(Xin)频(Pin)率(Lu) 40KHz
传(Chuan)感(Gan)器(Qi)直(Zhi)径(Jing) 16mm
测(Ce)试(Shi)源(Yuan) 24dB-30dB
地(Di)电(Dian)波(Bo)参(Can)数(Shu) 测(Ce)量(Liang)范(Fan)围(Wei) 0dBμV~60dBμV
分(Fen)辨(Bian)率(Lu) 1dB
传(Chuan)感(Gan)器(Qi) 电(Dian)容(Rong)性(Xing)
精(Jing)度(Du) ±1dB
每(Mei)周(Zhou)最(Zui)大(Da)脉(Mai)冲(Chong)数(Shu) 2K
最(Zui)小(Xiao)脉(Mai)冲(Chong)数(Shu) 5HZ
硬(Ying)件(Jian) 处(Chu)理(Li)器(Qi) 高(Gao)性(Xing)能(Neng)智(Zhi)能(Neng)处(Chu)理(Li)器(Qi)
显(Xian)示(Shi)屏(Ping) 4.3寸(Cun)触(Chu)摸(Mo)屏(Ping)
操(Cao)作(Zuo)按(An)键(Jian) PVE薄(Bao)膜(Mo)键(Jian)盘(Pan)
设(She)备(Bei)接(Jie)口(Kou) 3.5mm立(Li)体(Ti)声(Sheng)耳(?)机(Ji)接(Jie)口(Kou)
DC电(Dian)压(Ya)电(Dian)流(Liu)充(Chong)电(Dian)接(Jie)口(Kou)
USB 2.0 3G无(Wu)线(Xian)网(Wang)络(Luo)接(Jie)口(Kou)
TF存(Cun)储(Chu)卡(Ka)接(Jie)口(Kou)
外(Wai)接(Jie)探(Tan)头(Tou)传(Chuan)感(Gan)器(Qi)接(Jie)口(Kou)
TF存(Cun)储(Chu)卡(Ka) 容(Rong)量(Liang)4-32G
耳(?)机(Ji) 8欧(Ou)姆(Mu)
外(Wai)接(Jie)探(Tan)头(Tou) 超(Chao)声(Sheng)波(Bo)探(Tan)头(Tou)延(Yan)长(Chang)线(Xian)150mm
机(Ji)身(Shen)材(Cai)料(Liao) ABS+PC塑(Su)胶(Jiao)
重(Zhong)量(Liang) 0.9KG
尺(Chi)寸(Cun) 241mm*126mm*189mm
运(Yun)行(Xing)环(Huan)境(Jing) 工(Gong)作(Zuo)温(Wen)度(Du) 0-55℃(?)
工(Gong)作(Zuo)湿(Shi)度(Du) 0-90%相(Xiang)对(Dui)温(Wen)度(Du)无(Wu)凝(Ning)霜(Shuang)
IP等(Deng)级(Ji) 54
电(Dian)池(Chi)电(Dian)源(Yuan) 内(Nei)部(Bu)电(Dian)池(Chi) 3.7V 9000mAh锂(?)-离(Li)子(Zi)
正(Zheng)常(Chang)工(Gong)作(Zuo)时(Shi)间(Jian) 约(Yue)7小(Xiao)时(Shi)
省(Sheng)电(Dian)模(Mo)式(Shi) 自(Zi)动(Dong)关(Guan)机(Ji)时(Shi)间(Jian)((?)默(Mo)认(Ren)10分(Fen)钟(Zhong))(?)
充(Chong)电(Dian)器(Qi)额(E)定(Ding)电(Dian)压(Ya) 90-264V AC
充(Chong)电(Dian)电(Dian)压(Ya)/电(Dian)流(Liu) 5V/2.4A
完(Wan)全(Quan)充(Chong)电(Dian)时(Shi)间(Jian) 约(Yue)9小(Xiao)时(Shi)

应(Ying)用(Yong)领(Ling)域(Yu) APPLICATION FIELD
附(Fu)件(Jian)配(Pei)件(Jian) ACCESSORIES ACCESSORIES
权(Quan)威(Wei)鉴(Jian)定(Ding) AUTHORITY TO IDENTIFY

企(Qi)业(Ye)产(Chan)品(Pin)严(Yan)格(Ge)按(An)照(Zhao)国(Guo)际(Ji)、(?)国(Guo)家(Jia)标(Biao)准(Zhun)及(Ji)行(Xing)业(Ye)规(Gui)程(Cheng)生(Sheng)产(Chan),(?)通(Tong)过(Guo)国(Guo)家(Jia)、(?)各(Ge)省(Sheng)级(Ji)、(?)市(Shi)级(Ji)电(Dian)力(Li)研(Yan)究(Jiu)所(Suo)、(?)计(Ji)量(Liang)中(Zhong)心(Xin)及(Ji)电(Dian)力(Li)权(Quan)威(Wei)部(Bu)门(Men)的(De)检(Jian)测(Ce),(?)全(Quan)面(Mian)通(Tong)过(Guo)ISO9001国(Guo)际(Ji)质(Zhi)量(Liang)管(Guan)理(Li)体(Ti)系(Xi)认(Ren)证(Zheng)。(?)

操(Cao)作(Zuo)视(Shi)频(Pin) OPERATING VIDEO
售(Shou)后(Hou)保(Bao)障(Zhang) AFTER-SALE PROTECTION
相(Xiang)关(Guan)产(Chan)品(Pin)
/  RELATED PRODUCTS
技(Ji)术(Shu)资(Zi)料(Liao)
/  TECHNICAL DATA
友情鏈接: