久久噜国产精品拍拍拍拍,久久国产自偷自免费一区100,国产日韩久久久久69影院,91大神精品网站在线观看,色香蕉在线视频,热久久中文字幕,六月丁香伊人

電子元器件回收IC電子回收無錫收購瑞薩芯片_行業(yè)30% 免費發(fā)布IC電子回收信息

無錫收購瑞薩芯片_行業(yè)30%

更新時間:2025-09-17 編號:1d1jaop51be577
分享
管理
舉報
  • 100.00 元/片

  • 電子回收,回收電子料,回收電子庫存,收購電子

  • 起批量標準價
    100100元/片
    100100元/片
    ≥ 100100元/片
  • 5年

陳經理

15919897161 2554303081

021-15900575-153

微信在線

產品詳情

無錫收購瑞薩芯片_行業(yè)30%

關鍵詞
回收電子呆料,回收電子,收購瑞薩芯片,回收電子料
面向地區(qū)


無錫收購瑞薩芯片_行業(yè)30%聚東電子科技面向全國收購電子料、全國各地均有駐點,24小時隨時上門驗貨,現(xiàn)款結算,私密處理。我們的價格包你滿意,隨時恭候你的咨詢(我們不廢話,就是)無錫收購瑞薩芯片_行業(yè)30% C
3225X5R1H225M250AB
C
3225X5R1H335K250AB
C
3225X5R1H335M250AB
C
3225X5R1H475K250AB
C
3225X5R1H475M250AB
C
3225X5R1H685K250AB
C
3225X5R1H685M250AB
C
3225X5R2A155K200AB
C
3225X5R2A155M200AB
C
3225X5R2A225K230AB
C
3225X5R2A225M230AB
C
3225X5R2E154K200AA
C
3225X5R2E154M200AA
C
3225X5R2E224K200AA
C
3225X5R2E224M200AA
C
3225X5R2J473K200AA
C
3225X5R2J473M200AA
C
3225X5R2J683K200AA
C
3225X5R2J683M200AA
C
3225X6S0G107M250AC
C
3225X6S0J107M250AC
C
3225X6S0J476M250AC
C
3225X6S1C226M250AC
C
3225X6S1E106K250AC
C
3225X6S1E106M250AC
C
3225X6S1E685K250AB
C
3225X6S1E685M250AB
C
3225X6S1H106K250AC
C
3225X6S1H106M250AC
C
3225X6S1H475K250AB
C
3225X6S1H475M250AB
C
3225X6S1H685K250AC
C
3225X6S1H685M250AC
C
3225X6S1V106K250AC
C
3225X6S1V106M250AC
C
3225X6S1V685K250AC
C
3225X6S1V685M250AC
C
3225X7R1A226K230AC
C
3225X7R1A226M230AC
C
3225X7R1C106K200AB
C
3225X7R1C106M200AB
C
3225X7R1C156M250AB
C
3225X7R1C226K250AC
C
3225X7R1C226M250AC
C
3225X7R1C335K200AM
C
3225X7R1C475K250AM
C
3225X7R1C476
C
3225X7R1C476KT000E
C
3225X7R1E105K115AM
C
3225X7R1E106K250AC
C
3225X7R1E106KT000E
C
3225X7R1E106M250AC
C
3225X7R1E155K160AM
C
3225X7R1E225K200AM
C
3225X7R1E226M250AB
C
3225X7R1E335K160AA
C
3225X7R1E335M160AA
C
3225X7R1E475K200AA
C
3225X7R1E475M200AA
C
3225X7R1E685K250AB
C
3225X7R1E685M250AB
C
3225X7R1H105K160AA
C
3225X7R1H105M160AA
C
3225X7R1H106K250AC
C
3225X7R1H106M250AC
C
3225X7R1H155K200AA
C
3225X7R1H155M200AA
C
3225X7R1H225K200AB
C
3225X7R1H225K200AE
C
3225X7R1H225K250AB
C
3225X7R1H225M200AB
C
3225X7R1H225M200AE
C
3225X7R1H335K250AB
C
3225X7R1H335M250AB
C
3225X7R1H474K160AM
C
3225X7R1H475K250AB
C
3225X7R1H475M250AB
C
3225X7R1H684K200AM
C
3225X7R1N106K250AC
C
3225X7R1N106M250AC
C
3225X7R2A105K200AA
C
3225X7R2A105K200AE
C
3225X7R2A105K200AM
C
3225X7R2A105M200AA
C
3225X7R2A105M200AE
C
3225X7R2A155K200AB
C
3225X7R2A155M200AB
C
3225X7R2A225K230AB
C
3225X7R2A225K230AE
C
3225X7R2A225K230AM
C
3225X7R2A225M230AB
C
3225X7R2A225M230AE
C
3225X7R2A334K200AA
C
3225X7R2A334K200AM
C
3225X7R2A334M200AA
C
3225X7R2A474K200AA
C
3225X7R2A474K200AE
C
3225X7R2A474M200AA
C
3225X7R2A474M200AE
C
3225X7R2A684K160AA
C
3225X7R2A684M160AA
C
3225X7R2E104K200AA
C
3225X7R2E104K200AE
C
3225X7R2E104K200AM
C
3225X7R2E104M200AA
C
3225X7R2E104M200AE
C
3225X7R2E154K200AA
C
3225X7R2E154K200AM
C
3225X7R2E154M200AA
C
3225X7R2E224K200AA
C
3225X7R2E224K200AE
C
3225X7R2E224K200AM
C
3225X7R2E224M200AA
C
3225X7R2E224M200AE
C
3225X7R2J473K200AA
C
3225X7R2J473K200AE
C
3225X7R2J473K200AM
C
3225X7R2J473M200AA
C
3225X7R2J473M200AE
C
3225X7R2J683K200AA
C
3225X7R2J683K200AE
C
3225X7R2J683K200AM
C
3225X7R2J683M200AA
C
3225X7R2J683M200AE
C
3225X7S0J476M250AC
C
3225X7S1A476M250AC
C
3225X7S1H106K250AB
C
3225X7S1H106K250AE
C
3225X7S1H106M250AB
C
3225X7S1H106M250AE
C
3225X7S1H475K230AE
C
3225X7S1H475M230AE
C
3225X7S1H685K250AB
C
3225X7S1H685M250AB
C
3225X7S2A335K200AB
C
3225X7S2A335K200AE
C
3225X7S2A335M200AB
C
3225X7S2A335M200AE
C
3225X7S2A475K200AB
C
3225X7S2A475K200AE
C
3225X7S2A475M200AB
C
3225X7S2A475M200AE
C
3225X7T2E334K200AA
C
3225X7T2E334K200AE
C
3225X7T2E334M200AA
C
3225X7T2E334M200AE
C
3225X7T2J104K160AC
C
3225X7T2J104K160AE
C
3225X7T2J104M160AC
C
3225X7T2J104M160AE
C
3225X7T2J154K200AC
C
3225X7T2J154K200AE
C
3225X7T2J154M200AC
C
3225X7T2J154M200AE
C
3225X7T2W224K200AA
C
3225X7T2W224K200AE
C
3225X7T2W224M200AA
C
3225X7T2W224M200AE
C
3225X8L1C156M200AC
C
3225X8L1C226M250AC
C
3225X8L1H335K200AC
C
3225X8L1H475K200AC
C
3225X8R1C106K250AB
C
3225X8R1C106K250AE
C
3225X8R1C106M250AB
C
3225X8R1C106M250AE
C
3225X8R1C685K200AB
C
3225X8R1C685M200AB
C
3225X8R1E106K250AC
C
3225X8R1E106K250AE
C
3225X8R1E106M250AC
C
3225X8R1E106M250AE
C
3225X8R1E155K160AA
C
3225X8R1E155M160AA
C
3225X8R1E225K200AA
C
3225X8R1E225M200AA
C
3225X8R1E335K250AA
C
3225X8R1E335K250AE
C
3225X8R1E335M250AA
C
3225X8R1E335M250AE
C
3225X8R1E475K250AB
C
3225X8R1E475K250AE
C
3225X8R1E475M250AB
C
3225X8R1E475M250AE
C
3225X8R1E685K200AC
C
3225X8R1E685M200AC
C
3225X8R2A474K200AB
C
3225X8R2A474K200AE
C
3225X8R2A474M200AB
C
3225X8R2A474M200AE
C
3225X8R2A684K250AB
C
3225X8R2A684K250AE
C
3225X8R2A684M250AB
C
3225X8R2A684M250AE
C
3308
C
3336
C
3338
C
3508
C
3538
C
3558
C
3708
C
3750
C
3758
C
3808
C
3830
C
3850
C
3858
C
3950
C
3955
C
3958
C
3D02060A
C
3D02060E
C
3D02060F
C
3D02065E
C
3D03060A
C
3D03060E
C
3D03060F
C
3D03065E
C
3D04060A
C
3D04060E
C
3D04060F
C
3D04065A
C
3D04065E
C
3D06060A
C
3D06060F
C
3D06060G
C
3D06065A
C
3D06065E
C
3D06065I
C
3D08060A
C
3D08060G
C
3D08065A
C
3D08065E
C
3D08065I
C
3D10060A
C
3D10060G
無錫收購瑞薩芯片_行業(yè)30%無錫收購瑞薩芯片_行業(yè)30%1.現(xiàn)金價收購工廠庫存、呆料、庫存配件、IC芯片、內存芯片、貼片二三極管、貼片(直插)電容電阻等。
無錫收購瑞薩芯片_行業(yè)30%2.各類IC,二三極管,BGA各種電容電阻,發(fā)光管,接收頭,咪頭,晶振。
3.無錫收購瑞薩芯片_行業(yè)30%手機IC,CPU電源,字庫,功放,中頻,排線等。
無錫收購瑞薩芯片_行業(yè)30%4.電腦內存條,硬盤,CPU,主板,顯卡、VGA內存芯片:K4、K9、 HY開頭字母等。 無錫收購瑞薩芯片_行業(yè)30%
無錫收購瑞薩芯片_行業(yè)30%5.各種液晶屏及攝像配件的電子料。收購電子元件收購IC求購電子元件,收購電子元件收購電子元器件,收購庫存電子元件,回收電子元件,回收庫存電子元件,回收電子元器件,電子回收,電子收購,回收集成電路,收購集成電路,收購庫存呆滯料,無錫收購瑞薩芯片_行業(yè)30%回收電子料件,回收單片機,回收硬盤;長期收購庫存積壓各種電子元件,家電、通訊、電腦、設備、數(shù)碼等方面的所有電子元件,配件,半成品,成品等等,收購IC,晶體,二極管,三極管,單片機,鉭電容,電解電容,片容片阻,F(xiàn)LASH,電感,繼電器,電位器等等,收購內存條、無錫收購瑞薩芯片_行業(yè)30%網卡、顯卡、硬盤、手機咪頭、喇叭、液晶屏、MP3、MP4芯片。 中介付傭,以誠相待,歡迎有庫存電子的單位和個人來電洽談。A
DA4096-2ACPZ-R7
A
DA4096-2ACPZ-RL
A
DA4096-2ARMZ
A
DA4096-2ARMZ-R7
A
DA4096-2ARMZ-RL
A
DA4096-2WARMZ-R7
A
DA4096-2WARMZ-RL
A
DA4096-4ACPZ-R7
A
DA4096-4ACPZ-RL
A
DA4096-4ARUZ
A
DA4096-4ARUZ-R7
A
DA4096-4ARUZ-RL
A
DA4177-1ARMZ
A
DA4177-1ARMZ-R7
A
DA4177-1ARMZ-RL
A
DA4177-1ARZ
A
DA4177-1ARZ-R7
A
DA4177-1ARZ-RL
A
DA4177-2ARMZ
A
DA4177-2ARMZ-R7
A
DA4177-2ARMZ-RL
A
DA4177-2ARZ
A
DA4177-2ARZ-R7
A
DA4177-2ARZ-RL
A
DA4177-4ARUZ
A
DA4177-4ARUZ-R7
A
DA4177-4ARUZ-RL
A
DA4177-4ARZ
A
DA4177-4ARZ-R7
A
DA4177-4ARZ-RL
A
DA4254ACPZ
A
DA4254ACPZ-R7
A
DA4254ACPZ-RL
A
DA4254ACPZ-WP
A
DA4254ARUZ
A
DA4254ARUZ-R7
A
DA4254ARUZ-RL
A
DA4303-2ACPZ-R7
A
DA4303-2ACPZ-RL
A
DA4304-2ACPZ-R7
A
DA4304-2ACPZ-RL
A
DA4304-3ACPZ-R7
A
DA4304-4ACPZ-R7
A
DA4310-1ACPZ-R7
A
DA4310-1ARHZ
A
DA4310-1ARHZ-R7
A
DA4310-1ARHZ-RL
A
DA4311-1ARHZ
A
DA4311-1ARHZ-R7
A
DA4312-1ACPZ-R2
A
DA4312-1ACPZ-R7
A
DA4312-1ACPZ-RL
A
DA4320-1ACPZ-R7
A
DA4320-1ACPZ-RL
A
DA4350ARUZ
A
DA4350ARUZ-R7
A
DA4410-6ACPZ-R7
A
DA4410-6ACPZ-RL
A
DA4411-3ARQZ
A
DA4411-3ARQZ-R7
A
DA4411-3ARQZ-RL
A
DA4412-3ARQZ
A
DA4412-3ARQZ-R7
A
DA4412-3ARQZ-RL
A
DA4417-3ARMZ
A
DA4417-3ARMZ-R7
A
DA4417-3ARMZ-RL
A
DA4420-6ARQZ
A
DA4420-6ARQZ-R7



I
PP60R190P6
I
PP60R210CFD7
I
PP60R280CFD7
I
PP60R280P6
I
PP60R280P7
I
PP60R360P7
I
PP60R600P7
I
PP65R045C7
I
PP65R065C7
I
PP65R095C7
I
PP65R110CFD
I
PP65R110CFDA
I
PP65R125C7
I
PP65R150CFD
I
PP65R150CFDA
I
PP65R190C7
I
PP65R190CFD
I
PP65R190CFDA
I
PP65R225C7
I
PP65R310CFD
I
PP65R420CFD
I
PP70N04S4-06
I
PP70N10S3L-12
I
PP70N12S3-11
I
PP77N06S2-12
I
PP80N03S4L-03
I
PP80N04S4-03
I
PP80N04S4-04
I
PP80N04S4L-04
I
PP80N06S2-07
I
PP80N06S2-09
I
PP80N06S2L-07
I
PP80N06S4-07
I
PP80N08S2L-07
I
PP80N08S4-06
I
PP80P03P4L-04
I
PP80R1K2P7
I
PP80R1K4P7
I
PP80R280P7
I
PP80R360P7
I
PP80R450P7
I
PP80R600P7
I
PP80R750P7
I
PP80R900P7
I
PP90R1K2C3
I
PP90R340C3
I
PP90R800C3
I
PS160HTR(意法)
I
PS160H(意法)
I
PS161HTR(意法)
I
PS161H(意法)
I
PS4260LTR(意法)
I
PS4260L(意法)
I
PS60R1K0CE
I
PS60R1K0PFD7S
I
PS60R1K5CE
I
PS60R210PFD7S
I
PS60R280PFD7S
I
PS60R2K1CE
I
PS60R360PFD7S
I
PS60R3K4CE
I
PS60R400CE
I
PS60R600PFD7S
I
PS60R650CE
I
PS60R800CE
I
PS65R1K0CE
I
PS65R1K4C6
I
PS65R400CE
I
PS65R650CE
I
PS70R1K4CE
I
PS70R1K4P7S
I
PS70R2K0CE
I
PS70R360P7S
I
PS70R600P7S
I
PS70R900P7S
I
PS70R950CE
I
PS80R1K2P7
I
PS80R1K4P7
I
PS80R2K0P7
I
PS80R2K4P7
I
PS80R600P7
I
PS80R750P7
I
PS80R900P7
I
PSA70R1K2P7S
I
PSA70R1K4CE
I
PSA70R1K4P7S
I
PSA70R2K0CE
I
PSA70R2K0P7S
I
PSA70R360P7S
I
PSA70R450P7S
I
PSA70R600CE
I
PSA70R600P7S
I
PSA70R750P7S
I
PSA70R900P7S
I
PSA70R950CE
I
PT004N03L
I
PT007N06N
I
PT012N06N
I
PT012N08N5
I
PT015N10N5
I
PT019N08N5
I
PT020N10N3
I
PT020N10N5
I
PT026N10N5
I
PT029N08N5
I
PT059N15N3
I
PT111N20NFD
I
PT210N25NFD
I
PT60R022S7
I
PT60R028G7
I
PT60R040S7
I
PT60R050G7
I
PT60R065S7
I
PT60R080G7
I
PT60R102G7
I
PT60R125G7
I
PT60R150G7
I
PT65R033G7
I
PT65R105G7
I
PT65R195G7
I
PU60R1K0CE
I
PU60R1K5CE
I
PU60R2K1CE
I
PU80R1K0CE
I
PU80R1K2P7
I
PU80R1K4P7
I
PU80R2K0P7
I
PU80R2K4P7
I
PU80R3K3P7
I
PU80R4K5P7
I
PU80R600P7
I
PU80R750P7
I
PU80R900P7
I
PU95R1K2P7
I
PU95R2K0P7
I
PU95R3K7P7
I
PU95R450P7
I
PU95R750P7
I
PW60R017C7
I
PW60R018CFD7
I
PW60R024CFD7
I
PW60R024P7
I
PW60R031CFD7
I
PW60R037CSFD
I
PW60R037P7
I
PW60R040C7
I
PW60R040CFD7
I
PW60R041P6
I
PW60R045CPA
I
PW60R045P7
I
PW60R055CFD7
I
PW60R060C7
I
PW60R060P7
I
PW60R070CFD7
I
PW60R070P6
I
PW60R075CPA
I
PW60R080P7
I
PW60R090CFD7
I
PW60R099C7
I
PW60R099CPA
I
PW60R099P6
I
PW60R099P7
I
PW60R105CFD7
I
PW60R120C7
I
PW60R120P7
I
PW60R125CFD7
I
PW60R125P6
I
PW60R145CFD7
I
PW60R160P6
I
PW60R170CFD7
I
PW60R180C7
I
PW60R180P7
I
PW60R190C6
I
PW60R190P6
I
PW60R280P6
I
PW65R019C7
I
PW65R037C6
I
PW65R041CFD
I
PW65R045C7
I
PW65R048CFDA
I
PW65R065C7
I
PW65R080CFD
I
PW65R080CFDA
I
PW65R095C7
I
PW65R110CFD
I
PW65R110CFDA
I
PW65R125C7
I
PW65R150CFD
I
PW65R150CFDA
I
PW65R190C7
I
PW65R190CFD
I
PW65R190CFDA
I
PW65R420CFD
I
PW80R280P7
I
PW80R290C3A
I
PW80R360P7
I
PW90R120C3
I
PW90R340C3
I
PW90R500C3
I
PZ40N04S5-3R1
I
PZ40N04S5-5R4
I
PZ40N04S5-8R4
I
PZ40N04S5L-2R8
I
PZ40N04S5L-4R8
I
PZ40N04S5L-7R4
I
PZ60R017C7
I
PZ60R040C7
I
PZ60R060C7
I
PZ60R070P6
I
PZ60R099C7
I
PZ60R099P6
I
PZ65R019C7
I
PZ65R045C7
I
PZ65R065C7
I
PZ65R095C7
I
PZA60R024P7
I
PZA60R037P7
I
PZA60R045P7
I
PZA60R060P7
I
PZA60R080P7
I
PZA60R099P7
I
PZA60R120P7
I
PZA60R180P7
I
QBG-2000A +
I
R1011
I
R1150ISTRPBF
I
R1153S
I
R1155S
I
R1161L
I
R11662SPBF
I
R11672ASPBF
I
R1167BSPBF
I
R11682SPBF
I
R11688S
I
R1168SPBF
I
R1169S
I
R2010
I
R2010S
I
R2011
I
R2011S
I
R2086S
I
R2101
I
R2101S
I
R2102
I
R2102S
I
R2103
I
R2103S
I
R2104
I
R2104S
I
R2106
I
R21064
I
R21064S
I
R2106S
I
R2108
I
R21084
I
R21084S
I
R2108S
I
R2109
I
R21091
I
R21091S
I
R21094
I
R21094S
I
R2109S
I
R2110
I
R2110S
I
R2111
I
R2111S
I
R2112
I
R2112-2PBF
I
R2112S
I
R2113
I
R2113-2PBF(98-0119PBF)
I
R2113S
I
R2114SS
I
R2117
I
R2117S
I
R2118
I
R2118S
I
R2121
I
R2125
I
R2125S
I
R2127
I
R21271
I
R21271S
I
R2127S
I
R2128
I
R2128S
I
R2130
I
R2130J
I
R2130S
I
R2131
I
R2131J
I
R2131S
I
R2132
I
R2132J
I
R2132S
I
R2133
I
R2133J
I
R2133S
I
R2135J
I
R2135S
I
R2136
I
R21363J
I
R21363S
I
R21364S
I
R21365S
I
R21368S
I
R2136J
I
R2136S
I
R2153
I
R21531
I
R21531D
I
R21531S
I
R2153D
I
R2153S
I
R2155
I
R2156S
I
R2166S
I
R2172S
I
R2175
I
R2175S
I
R21771S
I
R2177S
I
R2181
I
R21814
I
R21814S
I
R2181S
I
R2181STRPBF
I
R2183
I
R21834
I
R21834S
I
R2183S
I
R2184
I
R21844
I
R21844S
I
R2184S
I
R2213
I
R2213S
I
R2214SS
I
R2233
I
R2233J
I
R2233S
I
R2235
I
R2235J
I
R2235S
I
R2238Q
I
R22771S
I
R2277S
I
R2301
I
R2301S
I
R2302
I
R2302S
I
R2304
I
R2304S
I
R2308
I
R2308S
I
R2520D
I
R2520DS
I
R25600
I
R25600S
I
R25601S
I
R25602S
I
R25603
I
R25603S
I
R25604S
I
R25606S
I
R25607S
I
R25750L
I
R3447M
I
R3448M
I
R35201MTRPBF
I
R35204MTRPBF
I
R35207MTRPBF
I
R35210MTRPBF
I
R35212MTRPBF
I
R35215MTRPBF
I
R3531A
I
R3535
I
R3536A
I
R3537
I
R3548
I
R3550
I
R3551
I
R3553
I
R3555
I
R3555A
I
R3556
I
R3557
I
R3564B
I
R3566B
I
R3567B
I
R3570B
I
R3575
I
R3578
I
R3579
I
R3579A
I
R3580
I
R3581
I
R3584
I
R3590B
I
R3595AMTRPBF
I
R3598
I
R3599
I
R3599A
I
R38060M
I
R38062M
I
R38063M
I
R38064MTRPBF
I
R38163M
I
R38164M
I
R38165M
I
R3821MTRPBF
I
R3823M
I
R3824MTRPBF
I
R3825MTRPBF
I
R38263M
I
R38265M
I
R3826AMTRPBF
I
R3826MTRPBF
I
R3827MTRPBF
I
R3828MTRPBF
I
R3829MTRPBF
I
R38363M
I
R38365M
I
R3846M
I
R3847M
I
R3853M
I
R3856M
I
R3883MTRPBF
I
R3888MTRPBF
I
R3889MTRPBF
I
R3891M
I
R3892M
I
R3894M
I
R3895M
I
R3897M
I
R3898M
I
R3899M
I
R3899MTRPBF
I
R4301M
I
R4302M
I
R4311M
I
R4312M
I
R4321M
I
R4322M
I
R44252L
I
R4426
I
R4426S
I
R4427
I
R44272L
I
R44273L
I
R4427S
I
R7106S
I
R7184S
I
R7304S
I
RA-S210ST01
I
RAM256-1567A
I
RF100B201
I
RF100B202
I
RF100P218
I
RF100P219
I
RF100S201
I
RF1010E
I
RF1010ES
I
RF1010EZ
I
RF1010EZS
I
RF1010N
I
RF1010NS
I
RF1010Z
I
RF1010ZS
I
RF1018E
I
RF1018ES
I
RF1104
I
RF1310N


下一篇:南京回收富士三極管_行業(yè)30%

留言板

  • 電子回收回收電子料回收電子庫存收購電子回收電子呆料回收電子收購瑞薩芯片
  • 價格商品詳情商品參數(shù)其它
  • 提交留言即代表同意更多商家聯(lián)系我

詳細資料

主營行業(yè):電子電器生產線
公司主營:電子,電子元器件
主營地區(qū):全國
企業(yè)類型:有限責任公司
公司成立時間:2021-03-12
經營模式:政府或其他機構
公司郵編:300000
公司電話:0755-15919897-161
小提示:無錫收購瑞薩芯片_行業(yè)30%描述文字和圖片由用戶自行上傳發(fā)布,其真實性、合法性由發(fā)布人負責。
陳經理: 15919897161 讓賣家聯(lián)系我