電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)（Motor）是(shi)(shi)把電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)轉(zhuan)(zhuan)(zhuan)換成(cheng)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)的(de)(de)一種設備。它(ta)(ta)是(shi)(shi)利用(yong)(yong)(yong)通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)線圈（也就是(shi)(shi)定子(zi)(zi)繞(rao)組(zu)）產(chan)生(sheng)(sheng)旋(xuan)轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)(ci)場并(bing)(bing)作(zuo)用(yong)(yong)(yong)于轉(zhuan)(zhuan)(zhuan)子(zi)(zi)（如鼠(shu)籠式(shi)閉合鋁(lv)框）形成(cheng)磁(ci)(ci)(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)力(li)旋(xuan)轉(zhuan)(zhuan)(zhuan)扭(niu)矩。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)按(an)使用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源不同(tong)分為(wei)(wei)直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)和(he)交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)系統中(zhong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)大部分是(shi)(shi)交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)，可(ke)以是(shi)(shi)同(tong)步電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)或(huo)(huo)者(zhe)是(shi)(shi)異步電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)（電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)定子(zi)(zi)磁(ci)(ci)(ci)場轉(zhuan)(zhuan)(zhuan)速(su)與轉(zhuan)(zhuan)(zhuan)子(zi)(zi)旋(xuan)轉(zhuan)(zhuan)(zhuan)轉(zhuan)(zhuan)(zhuan)速(su)不保(bao)持同(tong)步速(su)）。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)主要(yao)由定子(zi)(zi)與轉(zhuan)(zhuan)(zhuan)子(zi)(zi)組(zu)成(cheng)，通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)導線在(zai)磁(ci)(ci)(ci)場中(zhong)受力(li)運動(dong)(dong)(dong)(dong)(dong)的(de)(de)方向(xiang)跟(gen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)方向(xiang)和(he)磁(ci)(ci)(ci)感線（磁(ci)(ci)(ci)場方向(xiang)）方向(xiang)有關(guan)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)工作(zuo)原理是(shi)(shi)磁(ci)(ci)(ci)場對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)受力(li)的(de)(de)作(zuo)用(yong)(yong)(yong)，使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)(dong)(dong)。變頻器是(shi)(shi)現代電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)控(kong)制領域技(ji)(ji)術(shu)含量(liang)高(gao)，控(kong)制功能(neng)(neng)(neng)全(quan)、控(kong)制效(xiao)果好(hao)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)控(kong)制裝置，它(ta)(ta)通(tong)過改變電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)網(wang)的(de)(de)頻率來(lai)調節電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)的(de)(de)轉(zhuan)(zhuan)(zhuan)速(su)和(he)轉(zhuan)(zhuan)(zhuan)矩。因(yin)(yin)為(wei)(wei)涉(she)及(ji)到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)技(ji)(ji)術(shu)，微(wei)機(ji)(ji)(ji)(ji)(ji)(ji)技(ji)(ji)術(shu)，因(yin)(yin)此(ci)成(cheng)本高(gao)，對(dui)維護技(ji)(ji)術(shu)人(ren)員的(de)(de)要(yao)求也高(gao)，因(yin)(yin)此(ci)主要(yao)用(yong)(yong)(yong)在(zai)需(xu)要(yao)調速(su)并(bing)(bing)且對(dui)速(su)度控(kong)制要(yao)求高(gao)的(de)(de)領域。直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)是(shi)(shi)將直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)轉(zhuan)(zhuan)(zhuan)換為(wei)(wei)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)。因(yin)(yin)其良好(hao)的(de)(de)調速(su)性能(neng)(neng)(neng)而在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)拖動(dong)(dong)(dong)(dong)(dong)中(zhong)得到(dao)廣泛應(ying)用(yong)(yong)(yong)。直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)按(an)勵(li)(li)磁(ci)(ci)(ci)方式(shi)分為(wei)(wei)永磁(ci)(ci)(ci)、他(ta)勵(li)(li)和(he)自勵(li)(li)3類，其中(zhong)自勵(li)(li)又(you)分為(wei)(wei)并(bing)(bing)勵(li)(li)、串勵(li)(li)和(he)復(fu)勵(li)(li)3種。交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)是(shi)(shi)一種將交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)轉(zhuan)(zhuan)(zhuan)變為(wei)(wei)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)的(de)(de)裝置。交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)主要(yao)由一個用(yong)(yong)(yong)以產(chan)生(sheng)(sheng)磁(ci)(ci)(ci)場的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)鐵繞(rao)組(zu)或(huo)(huo)分布的(de)(de)定子(zi)(zi)繞(rao)組(zu)和(he)一個旋(xuan)轉(zhuan)(zhuan)(zhuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)樞或(huo)(huo)轉(zhuan)(zhuan)(zhuan)子(zi)(zi)組(zu)成(cheng)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)利用(yong)(yong)(yong)通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)線圈在(zai)磁(ci)(ci)(ci)場中(zhong)受力(li)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)(dong)(dong)的(de)(de)現象而制成(cheng)的(de)(de)。交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)分為(wei)(wei)同(tong)步交流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)和(he)感應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)兩(liang)種。

聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)是指聯(lian)(lian)(lian)(lian)(lian)(lian)接(jie)(jie)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)或軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)與(yu)回(hui)轉(zhuan)件(jian)，在(zai)傳遞(di)(di)運(yun)(yun)動(dong)(dong)和(he)(he)動(dong)(dong)力過程中(zhong)一同(tong)(tong)(tong)回(hui)轉(zhuan)，在(zai)正常(chang)(chang)情況(kuang)下不(bu)(bu)(bu)脫開的(de)(de)一種裝(zhuang)(zhuang)置。有(you)(you)(you)時也(ye)(ye)作為一種安全裝(zhuang)(zhuang)置用(yong)來(lai)防止(zhi)被聯(lian)(lian)(lian)(lian)(lian)(lian)接(jie)(jie)機(ji)(ji)件(jian)承受(shou)過大的(de)(de)載荷，起(qi)到(dao)過載保(bao)護的(de)(de)作用(yong)。聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)又稱聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)節。用(yong)來(lai)將不(bu)(bu)(bu)同(tong)(tong)(tong)機(ji)(ji)構中(zhong)的(de)(de)主(zhu)動(dong)(dong)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)和(he)(he)從動(dong)(dong)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)牢固地聯(lian)(lian)(lian)(lian)(lian)(lian)接(jie)(jie)起(qi)來(lai)一同(tong)(tong)(tong)旋轉(zhuan)，并傳遞(di)(di)運(yun)(yun)動(dong)(dong)和(he)(he)扭矩(ju)的(de)(de)機(ji)(ji)械部件(jian)。有(you)(you)(you)時也(ye)(ye)用(yong)以聯(lian)(lian)(lian)(lian)(lian)(lian)接(jie)(jie)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)與(yu)其(qi)他(ta)零件(jian)（如齒輪(lun)、帶輪(lun)等(deng)(deng)(deng)）。常(chang)(chang)由(you)兩(liang)(liang)半(ban)合成，分別用(yong)鍵(jian)或緊配(pei)合等(deng)(deng)(deng)聯(lian)(lian)(lian)(lian)(lian)(lian)接(jie)(jie)，緊固在(zai)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)端，再通過某(mou)種方式(shi)將兩(liang)(liang)半(ban)聯(lian)(lian)(lian)(lian)(lian)(lian)接(jie)(jie)起(qi)來(lai)。聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)可兼有(you)(you)(you)補(bu)償(chang)(chang)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)之間由(you)于制造(zao)安裝(zhuang)(zhuang)不(bu)(bu)(bu)精(jing)確(que)、工作時的(de)(de)變形或熱膨脹(zhang)等(deng)(deng)(deng)原(yuan)因(yin)(yin)所發生的(de)(de)偏(pian)移(yi)（包(bao)括軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)向偏(pian)移(yi)、徑向偏(pian)移(yi)、角偏(pian)移(yi)或綜合偏(pian)移(yi)）；以及緩和(he)(he)沖擊(ji)、吸(xi)振。剛性(xing)(xing)(xing)(xing)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)不(bu)(bu)(bu)具有(you)(you)(you)緩沖性(xing)(xing)(xing)(xing)和(he)(he)補(bu)償(chang)(chang)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)線(xian)(xian)相(xiang)對(dui)(dui)位移(yi)的(de)(de)能(neng)力，要求(qiu)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)嚴格對(dui)(dui)中(zhong)，但(dan)此類(lei)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)結構簡單(dan)，制造(zao)成本較低維便，能(neng)保(bao)證(zheng)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)有(you)(you)(you)較高的(de)(de)對(dui)(dui)中(zhong)性(xing)(xing)(xing)(xing)，傳遞(di)(di)轉(zhuan)矩(ju)較大，應用(yong)廣(guang)泛。常(chang)(chang)用(yong)的(de)(de)有(you)(you)(you)凸緣聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)、套筒聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)和(he)(he)夾殼聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)等(deng)(deng)(deng).撓(nao)性(xing)(xing)(xing)(xing)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)又可分為無(wu)彈(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)撓(nao)性(xing)(xing)(xing)(xing)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)和(he)(he)有(you)(you)(you)彈(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)撓(nao)性(xing)(xing)(xing)(xing)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)，前(qian)一類(lei)只具有(you)(you)(you)補(bu)償(chang)(chang)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)線(xian)(xian)相(xiang)對(dui)(dui)位移(yi)的(de)(de)能(neng)力，但(dan)不(bu)(bu)(bu)能(neng)緩沖減振，常(chang)(chang)見的(de)(de)有(you)(you)(you)滑(hua)塊聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)、齒式(shi)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)、萬向聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)和(he)(he)鏈條(tiao)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)等(deng)(deng)(deng)；后一類(lei)因(yin)(yin)含有(you)(you)(you)彈(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)，除具有(you)(you)(you)補(bu)償(chang)(chang)兩(liang)(liang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)線(xian)(xian)相(xiang)對(dui)(dui)位移(yi)的(de)(de)能(neng)力外，還(huan)具有(you)(you)(you)緩沖和(he)(he)減振作用(yong)，但(dan)傳遞(di)(di)的(de)(de)轉(zhuan)矩(ju)因(yin)(yin)受(shou)到(dao)彈(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)強(qiang)度的(de)(de)限制，一般不(bu)(bu)(bu)及無(wu)彈(dan)(dan)性(xing)(xing)(xing)(xing)元件(jian)撓(nao)性(xing)(xing)(xing)(xing)聯(lian)(lian)(lian)(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)(qi)(qi)。

BEDIA    備件    418152
BEDIA    傳感器    500039  PLCA 50 sensor with connector bayonet DIN72585
BEDIA    14針插座    DIN72585 420701
BEDIA    備件    320425
BEDIA    液位開關    NR60-W ICL01D11 DC12/24 bn/1=+ wh/2=- gn/3=s
BEDIA    水位開關    PLS40 422558
BEDIA    開關    PLS-40/3
BEDIA    水位傳感器    PLS-40 320439 negative switching(LSS)
BEDIA    機電    6700555
BEDIA    水位傳感器    PLCA-50 5061022218
BEDIA    電器件    420347
BEDIA    液位傳感器    ITS60-166-001V3
BEDIA    傳感器    ITS60_477_001V1
BEDIA    水位傳感器    CLS-40
BEDIA    備件    PLCA-50 5021021121
BEDIA    液位計    320405
BEDIA    油位計    600 518
BEDIA    液位開關    0050K009505 LS103A LS103B LS108A LS108B
BEDIA    備件    PLS-40 420467
BEDIA    備件    PLS-40 422558R0
BEDIA    備件    CLS-50 500083 DC 12/24 V
BEDIA    420312    420312
BEDIA    備件    CLS20 - 350538
BEDIA    開關    5021021311
BEDIA    傳感器    350 185
BEDIA    SENSOR    420186
BEDIA    Press Switch    420308 15300088 0000005136 2.7-R/C 10/18
BEDIA    備件    422286
BEDIA    備件    CLS40.12/24V
BEDIA    傳感器    420714
BEDIA    傳感器    216129018
BEDIA    傳感器    PLS42 422286
BEDIA    備件    PLCA-50  500143
BEDIA    備件    KÜHLMITTELSENSOR CLS-45 - 350210   2418993
BEDIA    傳感器    TLS100-WA25-CL0-A2M  10-30VDC 3-WIRE/NPN
BEDIA    備件    PLS-40 425032
BEDIA    液位開關    PLS-40 421575
BEDIA    水位傳感器    PLS-40 421579
BEDIA    備件    PT 1000 420269 13/37
BEDIA    備件    ITS 60 396 001V1  609396
BEDIA    液位計    PLS-40  421570
BEDIA    備件    NR:500083
BEDIA    備件    500058
BEDIA    4路插頭    DIN72585 42070

BEDIA 液(ye)位計(ji)PLS-40  421570翊霈(pei)代理供應

BEDIA 液位計PLS-40  421570翊霈代理供應