非(fei)(fei)侵入式(shi)在(zai)線(xian)PD測試該(gai)解決方(fang)案非(fei)(fei)常適合中壓(ya)(ya)設備(bei)，因(yin)為(wei)它是(shi)(shi)在(zai)設備(bei)在(zai)正常電(dian)壓(ya)(ya)、操(cao)作(zuo)條件(jian)和(he)應力(li)水(shui)平下運行(xing)時(shi)實時(shi)執行(xing)的(de)。在(zai)線(xian)測試相(xiang)對具有成本效益(yi)，因(yin)為(wei)該(gai)過程(cheng)是(shi)(shi)非(fei)(fei)侵入式(shi)的(de)（無(wu)(wu)停機時(shi)間，工作(zuo)電(dian)壓(ya)(ya)無(wu)(wu)變化(hua)）、非(fei)(fei)破壞性（不嘗(chang)試觸(chu)發(fa)任何故(gu)(gu)障），并(bing)且不會使系(xi)統暴露于任何過度的(de)電(dian)壓(ya)(ya)應力(li)。可(ke)(ke)以(yi)使用(yong)超聲波和(he)瞬態接地電(dian)壓(ya)(ya)(TEV)測量技術檢(jian)測表面(mian)和(he)內部局(ju)部放(fang)(fang)電(dian)活動。連續(xu)局(ju)部放(fang)(fang)電(dian)監測可(ke)(ke)以(yi)使用(yong)在(zai)線(xian)PD監視器連續(xu)遠程(cheng)記(ji)錄關鍵中壓(ya)(ya)設備(bei)中的(de)PD活動。實時(shi)記(ji)錄和(he)分(fen)析局(ju)部放(fang)(fang)電(dian)數據(ju)被證(zheng)明(ming)是(shi)(shi)有價值的(de)，尤其是(shi)(shi)在(zai)無(wu)(wu)人中心或(huo)老化(hua)系(xi)統的(de)情況下。持續(xu)監控可(ke)(ke)以(yi)準確地了解設備(bei)的(de)能力(li)和(he)狀(zhuang)態，警告任何即(ji)將發(fa)生的(de)故(gu)(gu)障，這些故(gu)(gu)障可(ke)(ke)能需(xu)要付出高昂的(de)代價才能糾正。分(fen)布式(shi)局(ju)部放(fang)(fang)電(dian)監測系(xi)統應用(yong)案例。分(fen)布式(shi)局(ju)放(fang)(fang)交(jiao)流(liu)電(dian)壓(ya)(ya)值

5、GZXJ-03型手(shou)持(chi)(chi)式(shi)(shi)多(duo)(duo)功(gong)能(neng)巡(xun)檢(jian)儀(yi)麥克風陣列傳感器與紅(hong)外熱成(cheng)(cheng)像機(ji)芯(xin)聯(lian)合(he)實(shi)現局(ju)部放電(dian)(dian)檢(jian)測(ce)，可大幅提(ti)(ti)升(sheng)檢(jian)測(ce)靈(ling)敏度(du)及準確(que)(que)度(du)，并具備放電(dian)(dian)類型識(shi)別功(gong)能(neng)；6、GZXJ-03型手(shou)持(chi)(chi)式(shi)(shi)多(duo)(duo)功(gong)能(neng)巡(xun)檢(jian)儀(yi)的(de)(de)紅(hong)外熱成(cheng)(cheng)像機(ji)芯(xin)集成(cheng)(cheng)20000個測(ce)溫點，確(que)(que)保更精細的(de)(de)測(ce)量結果及高(gao)清(qing)晰度(du)的(de)(de)可視化展示；7、針(zhen)對電(dian)(dian)力設備復雜的(de)(de)運行環境，GZXJ-03型手(shou)持(chi)(chi)式(shi)(shi)多(duo)(duo)功(gong)能(neng)巡(xun)檢(jian)儀(yi)采(cai)用硬件(jian)抗干(gan)擾電(dian)(dian)路及軟件(jian)抑制干(gan)擾算(suan)法，去除噪聲信號，確(que)(que)保數據(ju)真實(shi)可靠；8、GZXJ-03型手(shou)持(chi)(chi)式(shi)(shi)多(duo)(duo)功(gong)能(neng)巡(xun)檢(jian)儀(yi)可拍照和攝像，并支(zhi)持(chi)(chi)64GB數據(ju)存儲及回放；9、GZXJ-03型手(shou)持(chi)(chi)式(shi)(shi)多(duo)(duo)功(gong)能(neng)巡(xun)檢(jian)儀(yi)提(ti)(ti)供(gong)豐富的(de)(de)數據(ju)傳輸(shu)模式(shi)(shi)：WIFI-FTP、蜂(feng)窩網絡、TypcUSB3.0、高(gao)速SD卡、HDMI視頻、藍牙(ya)等(deng)數據(ju)傳輸(shu)等(deng)。GIS局(ju)放基本理論(lun)分(fen)布式(shi)(shi)高(gao)壓電(dian)(dian)纜局(ju)放監測(ce)與評(ping)估技術。

二、局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)電檢(jian)測方法2.3特(te)(te)高(gao)頻(pin)法局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)電產(chan)(chan)生的(de)(de)電流脈沖上升時(shi)間和持續(xu)(xu)時(shi)間為納(na)秒級，激發產(chan)(chan)生等值頻(pin)率(lv)處(chu)于(yu)(yu)特(te)(te)高(gao)頻(pin)300MHz～3GHz范(fan)圍的(de)(de)電磁波(bo)。目前(qian)，市場上大部(bu)分特(te)(te)高(gao)頻(pin)傳感(gan)器的(de)(de)檢(jian)測頻(pin)率(lv)范(fan)圍為300MHz～1.5GHz。由于(yu)(yu)信(xin)號(hao)(hao)微弱且頻(pin)率(lv)較高(gao)，特(te)(te)高(gao)頻(pin)法需將輸(shu)入信(xin)號(hao)(hao)經濾(lv)波(bo)電路、放(fang)(fang)(fang)(fang)大電路、積分電路調理(li)后，傳輸(shu)至數據(ju)采(cai)(cai)集卡以供(gong)后續(xu)(xu)分析(xi)。同(tong)時(shi)，采(cai)(cai)用(yong)特(te)(te)高(gao)頻(pin)法時(shi)，需從軟件(jian)和硬件(jian)方面消除通信(xin)信(xin)號(hao)(hao)、照(zhao)明電源(yuan)信(xin)號(hao)(hao)等噪音。特(te)(te)高(gao)頻(pin)法具有靈(ling)敏度高(gao)、抗干擾能(neng)力強、適用(yong)于(yu)(yu)局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)電定位(wei)的(de)(de)優點。懸浮(fu)電位(wei)處(chu)產(chan)(chan)生的(de)(de)局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)電特(te)(te)高(gao)頻(pin)信(xin)號(hao)(hao)的(de)(de)相位(wei)圖(tu)譜（PRPD）如(ru)下圖(tu)所示，包含放(fang)(fang)(fang)(fang)電的(de)(de)幅值、相位(wei)、次數信(xin)息。

三、局(ju)(ju)部(bu)放(fang)(fang)電(dian)分析方法3.5等效(xiao)時(shi)(shi)(shi)間-等效(xiao)頻(pin)率(lv)法(T-FMap)由(you)于不(bu)同種類(lei)的(de)絕緣缺(que)陷產生的(de)局(ju)(ju)部(bu)放(fang)(fang)電(dian)信號(hao)(hao)(hao)及各類(lei)噪音干擾具有不(bu)同的(de)時(shi)(shi)(shi)頻(pin)特性,可(ke)根據(ju)下式計算信號(hao)(hao)(hao)等效(xiao)時(shi)(shi)(shi)間????σ_T和等效(xiao)頻(pin)率(lv)????σ_F，等效(xiao)時(shi)(shi)(shi)間表(biao)(biao)示脈(mo)沖(chong)信號(hao)(hao)(hao)相對時(shi)(shi)(shi)間重心的(de)變(bian)化，等效(xiao)頻(pin)率(lv)表(biao)(biao)示脈(mo)沖(chong)信號(hao)(hao)(hao)相對頻(pin)率(lv)重心的(de)變(bian)化????=0??(?????0)2??(??)2????σ_T=√(∫_0^T?〖(t-t_0)^2s?(t)^2dt〗)????=0∞??2??(??)2????σ_F=√(∫_0^∞?〖f^2|S?(f)|^2df〗)其中(zhong)，??0t_0為(wei)(wei)脈(mo)沖(chong)信號(hao)(hao)(hao)的(de)時(shi)(shi)(shi)間重心，可(ke)由(you)式(4)計算；??(??)S?(f)為(wei)(wei)標準(zhun)化脈(mo)沖(chong)信號(hao)(hao)(hao)??(??)s?(t)的(de)傅(fu)里葉變(bian)換。在同一絕緣缺(que)陷處產生的(de)局(ju)(ju)部(bu)放(fang)(fang)電(dian)脈(mo)沖(chong)信號(hao)(hao)(hao)會在等效(xiao)時(shi)(shi)(shi)間-等效(xiao)頻(pin)率(lv)圖譜上(shang)形成集中(zhong)的(de)點簇分布，通過與(yu)系統故障類(lei)型數(shu)據(ju)庫(ku)對比，可(ke)識別實時(shi)(shi)(shi)采集的(de)放(fang)(fang)電(dian)或噪音信號(hao)(hao)(hao)，并(bing)判斷放(fang)(fang)電(dian)類(lei)型。局(ju)(ju)部(bu)放(fang)(fang)電(dian) - 測試(shi)有哪些方法？

系(xi)(xi)統構(gou)成(cheng)及(ji)功(gong)能(neng)參(can)數2.1系(xi)(xi)統構(gou)成(cheng)GZPD-4D型分(fen)(fen)布式高(gao)壓電(dian)纜局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)(fang)電(dian)監(jian)測(ce)與評價系(xi)(xi)統構(gou)成(cheng)如上(shang)(shang)頁示意圖(tu)所示，主(zhu)要(yao)包括下列(lie)5類單元(yuan)：?傳(chuan)感器(qi)單元(yuan)：采(cai)用開合式鉗形高(gao)頻(pin)電(dian)流傳(chuan)感器(qi)(HFCT)，結構(gou)緊湊，安裝拆(chai)卸方便(bian)，無需停電(dian)；?同步(bu)單元(yuan)：羅氏線(xian)圈多(duo)檔可(ke)調，適用于不同電(dian)壓等級電(dian)纜局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)(fang)電(dian)監(jian)測(ce)的工頻(pin)相位(wei)同步(bu)；?采(cai)樣及(ji)通(tong)(tong)信(xin)單元(yuan)：具備(bei)信(xin)號放(fang)(fang)(fang)(fang)(fang)大、濾波、A/D轉(zhuan)換(huan)功(gong)能(neng)，支持多(duo)通(tong)(tong)道(dao)同步(bu)采(cai)集(ji)(ji)(ji)；具備(bei)邊緣計算能(neng)力，內(nei)置4G/5G傳(chuan)輸(shu)模塊，實(shi)時(shi)傳(chuan)輸(shu)原始數據(ju)及(ji)本地分(fen)(fen)析(xi)(xi)結果；?云服(fu)務器(qi)（ECS）：實(shi)現(xian)客(ke)戶(hu)端(duan)(duan)(duan)及(ji)采(cai)集(ji)(ji)(ji)單元(yuan)分(fen)(fen)布式組網(wang)，實(shi)時(shi)轉(zhuan)發客(ke)戶(hu)端(duan)(duan)(duan)控制指(zhi)令，接收采(cai)集(ji)(ji)(ji)單元(yuan)上(shang)(shang)傳(chuan)數據(ju)，支持高(gao)網(wang)絡包收發及(ji)海量數據(ju)存(cun)儲；?客(ke)戶(hu)端(duan)(duan)(duan)(上(shang)(shang)位(wei)機)：具備(bei)采(cai)集(ji)(ji)(ji)單元(yuan)控制(采(cai)樣脈沖(chong)數、時(shi)長、數字(zi)濾波器(qi)等)、數據(ju)接收及(ji)智能(neng)分(fen)(fen)析(xi)(xi)功(gong)能(neng)，支持脈沖(chong)波形、波形頻(pin)譜(pu)(pu)、PRPD圖(tu)譜(pu)(pu)、等效(xiao)時(shi)頻(pin)圖(tu)譜(pu)(pu)(TF-Map)、放(fang)(fang)(fang)(fang)(fang)電(dian)基本參(can)數顯示，可(ke)實(shi)現(xian)地圖(tu)篩(shai)選、分(fen)(fen)組篩(shai)選、放(fang)(fang)(fang)(fang)(fang)電(dian)類型識別、趨勢分(fen)(fen)析(xi)(xi)、自動保存(cun)等功(gong)能(neng)。GZPD-234系(xi)(xi)列(lie)GIS局(ju)(ju)部(bu)放(fang)(fang)(fang)(fang)(fang)電(dian)監(jian)測(ce)與定位(wei)系(xi)(xi)統功(gong)能(neng)特點。GIS局(ju)(ju)放(fang)(fang)(fang)(fang)(fang)基本理論(lun)

杭州國洲電力科技有(you)限(xian)公司局放產品(pin)的(de)優勢。分布式(shi)局放交流(liu)電壓值

高(gao)(gao)壓開關柜(ju)局(ju)部(bu)(bu)放電(dian)對(dui)策：1、規范(fan)選(xuan)(xuan)材和(he)安裝(zhuang)。在安裝(zhuang)加(jia)工母線(xian)和(he)加(jia)工銅排(pai)倒角時，嚴格按照(zhao)相(xiang)關規范(fan)進行操作。優化電(dian)極(ji)形狀增(zeng)加(jia)了(le)電(dian)極(ji)曲率半徑，實現了(le)電(dian)場的(de)均勻(yun)分(fen)布(bu)，從(cong)而提高(gao)(gao)了(le)間隙的(de)擊穿電(dian)壓。為避免局(ju)部(bu)(bu)電(dian)場過于集(ji)中，母排(pai)搭(da)接(jie)時，固定(ding)螺栓外露部(bu)(bu)分(fen)不得超(chao)過3齒，母排(pai)搭(da)接(jie)部(bu)(bu)分(fen)應(ying)保證搭(da)接(jie)面齊平。在選(xuan)(xuan)擇屏(ping)蔽(bi)接(jie)觸盒時，比(bi)較好選(xuan)(xuan)擇有屏(ping)蔽(bi)設計的(de)接(jie)觸盒，以(yi)達到(dao)均勻(yun)分(fen)布(bu)電(dian)場和(he)防(fang)止(zhi)電(dian)場過度(du)集(ji)中的(de)目的(de)。2、控(kong)制(zhi)絕(jue)緣(yuan)缺陷(xian)。供電(dian)設備(bei)的(de)可靠(kao)性(xing)是由電(dian)氣設備(bei)絕(jue)緣(yuan)結構的(de)性(xing)能(neng)決定(ding)的(de)。為了(le)比(bi)較大限度(du)地發揮電(dian)氣設備(bei)的(de)絕(jue)緣(yuan)性(xing)能(neng)，控(kong)制(zhi)絕(jue)緣(yuan)缺陷(xian)，高(gao)(gao)壓開關柜(ju)內部(bu)(bu)的(de)絕(jue)緣(yuan)板(ban)應(ying)涂刷防(fang)污防(fang)潮漆，以(yi)增(zeng)加(jia)絕(jue)緣(yuan)板(ban)的(de)疏水性(xing)。分(fen)布(bu)式局(ju)放交流(liu)電(dian)壓值

國(guo)(guo)洲(zhou)電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)，2013-05-09正式啟動，成(cheng)立(li)了(le)便攜(xie)(xie)手(shou)持(chi)(chi)在(zai)線(xian)(xian)綜(zong)合(he)(he)局(ju)部(bu)放電(dian)(dian)(dian)(dian)，便攜(xie)(xie)在(zai)線(xian)(xian)綜(zong)合(he)(he)振(zhen)動聲(sheng)學(xue)指紋(wen)，變(bian)(bian)壓器(qi)(qi)斷(duan)路(lu)器(qi)(qi)電(dian)(dian)(dian)(dian)纜(lan)高(gao)壓試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，帶(dai)電(dian)(dian)(dian)(dian)檢(jian)測(ce)交(jiao)接試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)技(ji)(ji)術(shu)(shu)(shu)(shu)服(fu)(fu)務(wu)(wu)等幾大市(shi)(shi)場(chang)(chang)(chang)布(bu)局(ju)，應(ying)對行業(ye)(ye)(ye)(ye)變(bian)(bian)化，順應(ying)市(shi)(shi)場(chang)(chang)(chang)趨勢(shi)發展，在(zai)創新中(zhong)尋求突破，進(jin)(jin)而提升國(guo)(guo)洲(zhou)電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)的(de)(de)市(shi)(shi)場(chang)(chang)(chang)競爭力(li)(li)(li)(li)(li)，把握市(shi)(shi)場(chang)(chang)(chang)機(ji)遇，推動儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)產(chan)業(ye)(ye)(ye)(ye)的(de)(de)進(jin)(jin)步(bu)。旗下國(guo)(guo)洲(zhou)電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)在(zai)儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)行業(ye)(ye)(ye)(ye)擁有一(yi)定的(de)(de)地位(wei)，品牌價值持(chi)(chi)續增(zeng)長，有望成(cheng)為行業(ye)(ye)(ye)(ye)中(zhong)的(de)(de)佼佼者。我們強化內部(bu)資源整合(he)(he)與業(ye)(ye)(ye)(ye)務(wu)(wu)協同(tong)，致力(li)(li)(li)(li)(li)于便攜(xie)(xie)手(shou)持(chi)(chi)在(zai)線(xian)(xian)綜(zong)合(he)(he)局(ju)部(bu)放電(dian)(dian)(dian)(dian)，便攜(xie)(xie)在(zai)線(xian)(xian)綜(zong)合(he)(he)振(zhen)動聲(sheng)學(xue)指紋(wen)，變(bian)(bian)壓器(qi)(qi)斷(duan)路(lu)器(qi)(qi)電(dian)(dian)(dian)(dian)纜(lan)高(gao)壓試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，帶(dai)電(dian)(dian)(dian)(dian)檢(jian)測(ce)交(jiao)接試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)技(ji)(ji)術(shu)(shu)(shu)(shu)服(fu)(fu)務(wu)(wu)等實現(xian)一(yi)體化，建立(li)了(le)成(cheng)熟的(de)(de)便攜(xie)(xie)手(shou)持(chi)(chi)在(zai)線(xian)(xian)綜(zong)合(he)(he)局(ju)部(bu)放電(dian)(dian)(dian)(dian)，便攜(xie)(xie)在(zai)線(xian)(xian)綜(zong)合(he)(he)振(zhen)動聲(sheng)學(xue)指紋(wen)，變(bian)(bian)壓器(qi)(qi)斷(duan)路(lu)器(qi)(qi)電(dian)(dian)(dian)(dian)纜(lan)高(gao)壓試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，帶(dai)電(dian)(dian)(dian)(dian)檢(jian)測(ce)交(jiao)接試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)技(ji)(ji)術(shu)(shu)(shu)(shu)服(fu)(fu)務(wu)(wu)運營(ying)及風險(xian)管(guan)理體系，累(lei)積了(le)豐(feng)富的(de)(de)儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)行業(ye)(ye)(ye)(ye)管(guan)理經驗(yan)(yan)(yan)(yan)，擁有一(yi)大批專業(ye)(ye)(ye)(ye)人才(cai)。杭州國(guo)(guo)洲(zhou)電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)科(ke)技(ji)(ji)有限公(gong)司(si)業(ye)(ye)(ye)(ye)務(wu)(wu)范圍涉及電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)技(ji)(ji)術(shu)(shu)(shu)(shu)、電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)產(chan)品、高(gao)壓試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)設(she)(she)(she)備(bei)(bei)(bei)、電(dian)(dian)(dian)(dian)氣(qi)設(she)(she)(she)備(bei)(bei)(bei)、儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)、五金(jin)(jin)工具、電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)工具的(de)(de)技(ji)(ji)術(shu)(shu)(shu)(shu)開發、技(ji)(ji)術(shu)(shu)(shu)(shu)咨詢、技(ji)(ji)術(shu)(shu)(shu)(shu)服(fu)(fu)務(wu)(wu);電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)、電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)、電(dian)(dian)(dian)(dian)氣(qi)設(she)(she)(she)備(bei)(bei)(bei)的(de)(de)生(sheng)產(chan)、制(zhi)造、維修(xiu);儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)、五金(jin)(jin)工具、電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)工具、電(dian)(dian)(dian)(dian)氣(qi)設(she)(she)(she)備(bei)(bei)(bei)、計算機(ji)軟件、電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)的(de)(de)銷售(shou);電(dian)(dian)(dian)(dian)力(li)(li)(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)、電(dian)(dian)(dian)(dian)氣(qi)設(she)(she)(she)備(bei)(bei)(bei)的(de)(de)租賃。含下屬分支(zhi)機(ji)構經營(ying)范圍。(依法須經批準的(de)(de)項目，經相關部(bu)門批準后(hou)方可(ke)開展經營(ying)活(huo)動)等多個環節，在(zai)國(guo)(guo)內儀(yi)(yi)(yi)(yi)器(qi)(qi)儀(yi)(yi)(yi)(yi)表(biao)行業(ye)(ye)(ye)(ye)擁有綜(zong)合(he)(he)優勢(shi)。在(zai)便攜(xie)(xie)手(shou)持(chi)(chi)在(zai)線(xian)(xian)綜(zong)合(he)(he)局(ju)部(bu)放電(dian)(dian)(dian)(dian)，便攜(xie)(xie)在(zai)線(xian)(xian)綜(zong)合(he)(he)振(zhen)動聲(sheng)學(xue)指紋(wen)，變(bian)(bian)壓器(qi)(qi)斷(duan)路(lu)器(qi)(qi)電(dian)(dian)(dian)(dian)纜(lan)高(gao)壓試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，帶(dai)電(dian)(dian)(dian)(dian)檢(jian)測(ce)交(jiao)接試(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)技(ji)(ji)術(shu)(shu)(shu)(shu)服(fu)(fu)務(wu)(wu)等領(ling)域(yu)完成(cheng)了(le)眾多可(ke)靠項目。

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