AGAM-20/11/210/M-AO 220 21阿托斯
 意大利ATOS、ATOS電磁閥、ATOS比例閥、ATOS控制閥、ATOS常規閥、ATOS疊加閥、ATOS插裝閥、ATOS柱塞泵、ATOS葉片泵 
上海維特銳實業發展有限公司專業代理意大利ATOS阿托斯，銷售ATOS(阿托斯)液壓元件：ATOS阿托斯系列葉片泵，ATOS阿托斯電磁閥,，ATOS阿托斯柱塞泵，ATOS系列電磁閥，ATOS疊加閥，ATOS比例閥...阿托斯產品——主要用于鋼鐵，冶金，電力，注塑機，空調生產，汽車制造業，備有大量庫存，并提供*的技術及售后服務，--給您合理的價格，*的服務！
   做好做強ATOS阿托斯，精誠，協力，盡心盡力與客戶共同前進的就是我們——上海維特銳實業發展有限公司專業代理意大利ATOS阿托斯，銷售ATOS(阿托斯)液壓元件：要用于鋼鐵，冶金，電力，注塑機，空調生產，汽車制造業，備有大量庫存，并提供*的技術及售后服務,合理的價格，*的服務    
RZMO-P1/010/210  RZMO-P1/010/315  RZMO-P1/010/100  RAMO-P1/010/350  AGMZO-A-010/210  DHZ-0631/2PE  DHU-0631-220  DLOH-3A-U/7  DHI-075/12/WP DLOH-3C-U/20 
現貨意大利ATOS繼電器 MAP-160/20     MAP-080/20   MAP-320/20    
DHI-0610/A-X 230/50/60AC,DHI-0610/A-X 24DC 23,DHI-0610-X 110/50/60AC,DHI-0610-X 230/50/60AC 23,DHI-0610-X 24DC,DHI-0611/A-X 24DC 23,DHI-0611/FC-X 24DC 23,DHI-06119/A-X 24DC 23,DHI-0611-X 24DC 23,DHI-0612/A-X 24DC,DHI-0613/A-X 24DC 23,DHI-0613/WP-X 230AC,DHI-0613-X 230/50/60AC,DHI-0613-X 24DC,DHI-0614-X 24DC,DHI-0616/A-X 230/50/60AC,DHI-0618/A-X 24DC 23,DHI-0630/2/A-X 230/50/60AC 23,DHI-0630/2/A-X 24DC 23,DHI-0630/2-X 24DC,DHI-0631/1/2/A-X 24DC,DHI-0631/2/A-IX 24DC,DHI-0631/2/A-X 110/50/60AC 23,DHI-0631/2/A-X 230/50/60AC 23,DHI-0631/2/P-X 24DC,DHI-0631/2/WP-X 12DC 23,DHI-0631/2/WP-X 220DC 23,DHI-0631/2/WP-X 230/50/60AC,DHI-0631/2P/A-X 24DC,DHI-0631/2P-X 24DC,DHI-0631/2-X 230/50/60AC,DHI-0631/2-X 110/50/60AC,DHI-0631/2-X 220DC   DHU-0631-220  ATOS
線圈SP-COU-24DC  SP-COUR-24DC   SP-COI-110/50DHI-0631/2-X 24DC,DHI-0632/2/A-X 230/50/60AC 23,DHI-0632/2/A-X 24DC 23,DHI-0632/2-X 230/50/60AC,DHI-0632/2-X 24DC 23,DHI-0639/C-X 24DC 23,DHI-0670-X 24DC 23,DHI-0671/A-X 24DC,DHI-0671/FC-X 24DC 23,DHI-0674-X 24DC 23,DHI-0701/2-X 110/50/60AC,DHI-0710/WP-X 24DC 23,DHI-0710-X 230/50/60AC,DHI-0710-X 24DC,DHI-0711-X 24DC,DHI-0711-X 110/50/60AC 23,DHI-0711-X 230/50/60AC,DHI-0713/1-X 230/50/60AC,DHI-0713/WP-X 12DC 23,DHI-0713/WP-X 230/50/60AC 23,DHI-0713/WP-X 24DC 23,DHI-07139-X 24DC 23,DHI-0713P 24DC,DHI-0713-X 110/50/60AC,DHI-0713-X 230/50/60AC,DHI-0713-X 24DC,DHI-0713-X 24DC 23/PE,DHI-0714/WP-X 230/50/60AC,DHI-0714/WP-X 230/50/60AC 23/PE,DHI-0714-X 230/50/60AC,DHI-0714-X 24DC,DHI-0715/FI/NC-X 24DC,DHI-0715-X 24DC, DHI-0716-X 24DC,DHI-0717-X 24DC,DHI-0718-X 230/50/60AC,DHI-0718-X 24DC,DHI-0750/2-X 24DC,DHI-0751/2/FI/NC-X 24DC 23,DHI-0751/2/FI/NO-X 24DC 23,DHI-0751/2/WP-X 230/50/60AC,DHI-0751/2/WP-X 230/50/60AC 23/PE,DHI-0751/2/WP-X 24DC,DHI-0751/2-X 110/50/60AC 23,DHI-0751/2-X 230/50/60AC,DHI-0751/2-X 24DC,DHI-0630/2/A-X 24DC 20,DHO-0631/2/A-X 24DC 20,DHO-0631/2/L1-X 24DC 20,DHO-0631/2-X 24DC,DHO-0639/O-X 24DC 20,DHO-0710-X 24DC 20,DHO-0711-X 24DC,DHO-0713-X 24DC 20,DHO-07191-X 24DC,DHO-0750/2-X 24DC 20
現貨意大利阿托斯ATOS放大器   
E-MI-AC-01F   E-BM-AS-PS-01H     E-ATR-7/400   E-ME-AC-01F  W-BM-AS-PS-01H              E-ME-AC-05F    E-BM-AC-01F
E-BM-AC-01F,E-BM-AC-011F/I,E-BM-AC-01F/RR,E-BM-AC-01F 11/2,E-BM-AC-01F 11/3,E-BM-AC-01F/RR 11/1,E-BM-AC-05F 11/3,E-BM-AC-05F 11/4,E-BM-AC-05F/RR 11/3,E-K-11B,E-K-32M,E-K-32P,E-ME-AC-01F 20,E-ME-AC-01F 20/1,E-ME-AC-01F 20/2,E-ME-AC-01F 20/3,E-ME-AC-01F 20/4,E-ME-AC-01F 20/6,E-ME-AC-01F
20/A1,E-ME-AC-01F 20/A2,E-ME-AC-01F 20/A4,E-ME-AC-01F/4R-4 20,E-ME-AC-01F/4R-4 20/2,E-ME-AC-01F/4R-4 20/3,E-ME-AC-01F/4R-4 20/6,E-ME-AC-01F/I 20,E-ME-AC-01F/I 20/2,E-ME-AC-01F/I 20/4,E-ME-AC-01F/I 20/6,E-ME-AC-01F/RR 20/4,E-ME-AC-01F/RR 20/A2,E-ME-AC-01F/RR-4 20,E-ME-AC-01F/RR-4 20/3,E-ME-AC-01F/RR-4 20/6,E-ME-AC-01F-4 20/2,E-ME-AC-05F 20,E-ME-AC-05F 20/2,E-ME-AC-05F 20/3,E-ME-AC-05F 20/4,E-ME-AC-05F 20/A3,E-ME-AC-05F/4R-4 20/3,E-ME-AC-05F/4R-4 20/4,E-ME-AC-05F/I 20,E-ME-AC-05F/I 20/3,E-ME-AC-05F/I 20 /4,E-ME-AC-05F/RR 20,E-ME-AC-05F/RR 20/3,E-ME-AC-05F/RR 20/4,E-ME-AC-05F/RR-4 20/3,E-ME-AC-05F/RR-4 20/4,E-ME-AC-05F-4 20/3,E-ME-AC-05F-4 20/4,E-ME-K-PID,E-ME-L-01H 40/DL17SA,E-ME-L-01H 40/DL26SB,E-ME-L-01H 40/DL27SB,E-ME-L-01H 40/DL27SB,E-ME-L-01H 40 /DL27SB,E-ME-L-01H 40/DL35SB,E-ME-L-01H 40/DL67SA,E-ME-L-01H 40/LQ22SA,E-ME-L-01H 40/LQ32SA,E-ME-L-01H 40/DL27SB,E-ME-L-01H 40/PCNNSA,E-ME-L-01H/DL27SB,E-ME-L-01H/I 40/LQ32SAATOS換向閥型號：DKE-1631/2 24DC  DKER-1711,DKE-1713-X 24DC ,DKE-1618-SP666-24DC ,DKE-1718-X 24DC DKE-1631/2-X 24DC
DKE-1713-X24DC DKE-1711-X 24DC   DKE-1710-X 24DC  DKE-1630/2-X  DKER-1631/2 DKER-1751/2  DKE-1631/2-X24DC+SP667  DKE-1611-X 24DC DKOR-1611/A-X 24DC,DKOR-1631/2-X 24DC,DKOR-1671-X 24DC,DKOR-1710-X 24DC 10,DKOR-1711/L-X 24DC 10,DKOR-1711-X 24DC 10,DKOR-1713-X 24DC,DKOR-1714-X 24DC 10,SDHI-0631/2 SDHI-0631/2/A-X 24DC,SDHI-0631/2-X 24DC,SDHI-0639/C-X 24DC 23,SDHI-0639/O-X 230/50/60AC 23,SDHI-0639/O-X 24DC,SDHI-0710-X 230/50/60AC 23,SDHI-0711-X 12DC 23,SDPHI-2711/1/D-X 24DC 31,SDPHI-2711/D-X 24DC,SDPHI-2713/D-X 24DC,SDPHI-2713-X 24DC,SDPHI-27191/D-X 24DC,SDPHI-3631/2-X 24DC 53,SDPHI-3711/1/DE-X 24DC,SDPHI-3711/1/D-X 24DC,SDPHI-3711/1/E-X 24DC,SDPHI-3711/DE-X 24DC,SDPHI-3711/D-X 24DC,SDPHI-3713/E-X 230/50/60AC 53,SDPHI-QV-06/1 QV-06/11 QV-06/16  QV-06/16/V 60  QV-06/24   QV-06/24/K 60 QV-06/6   QV-06/6/V 60   QV-10/2  QV-10/2/V 53 QV-10/3/K QV-20/2 QV-20/2/K QV-20/2/V 53
QV-20/3 53    PFEX2-51150/51150/3DW 23    PFEX2-51150/51150/3DV 23 
PFEX2-51150/51129/3DV 23  PFEX2-42045/31022/3DT 21   PFEX2-31036/31022/1DT PFED-54150/085/3DWO 21 PFED-54150/085/1SVO 21 PFED-54150/070/3DVO PFED-54129/029/1DWG 21  PFED-54110/056/3DWB 21   PFED-54110/056/1DUO 21  PFED-54110/029/1DUO 
PFED-54110/029/1DTO 21  PFED-54090/070/3DUF 21   PFED-54090/070/1DVO 21   PFED-54090/070/1DUO 21  PFED-43070/044/1DVO 
PFED-43070/044/1DUO 20  PFED-43070/016/1DUO PFED-43056/016/1DTO  PFED-43045/044/1DVO 20   PFED-43045/044/1DTO 
PFED-43045/028/1DTO 20  PFED-43037/022/1DVO 20  PFED-43037/016/3SUO 20  PFED-43037/016/1DTA   PFED-43029/028/1DVO 20
PFED-43029/016/1SWO  PFED-43029/016/1DWO 20  PFE-52110/3DT 31 PFE-52090/3DT 31 PFE-51150/3DV  PFE-51150/1DT 
PFE-51129/1DT   PFE-51110/3DT 23   PFE-51110/1DU 23  PFE-51110/1DT 23    PFE-51090/1DU  PFE-51090/1DT 23
PFE-42070/7DV  PFE-42070/3DW 20  PFE-42070/3DU  PFE-42070/3DT 20  PFE-42056/3DU 20   PFE-42045/3DW 20  
PFE-41085/1DW 20  PFE-41085/1DT 20  PFE-41070/2DV 20 PFE-41070/2DT 20  PFE-41070/1DV 20  PFE-41070/1DT  PFE-41056/1DW 20 
PFE-41056/1DV 20 PFE-41056/1DU 20  PFE-41056/1DT    PFE-41045/1DW 20  PFE-41045/1DU 20  PFE-41045/1DT  PFE-41037/1DU 20 
PFE-32036/3DT   PFE-32028/3DV 20 PFE-32028/3DT 20 PFE-31044/1DV 20 PFE-31044/1DU 20  PFE-31044/1DT 20  PFE-31036/1DW  
 PFE-31036/1DV 20  PFE-31036/1DU 20  PFE-31036/1DT  PFE-31028/1DV PFE-31028/1DU  PFE-31028/1DT  PFE-31022/1DW 
 PFE-31022/1DU  PFE-31022/1DT  PFE-31016/1DU  PFE-31016/1DT
ATOS插裝閥型號：
LIDEW1-1-IX 24DC 10,LIDEW1-2/B-IX 24DC 10,LIDEW1-2/E-IX 24DC,LIDEW1-2-IX 24DC 10,LIDEW1-3/E-IX 24DC,LIDEW1-4-IX 24DC 10, LIDEW1-4-IX 24DC 10 X12A,F12A,LIDEW1-6-IX 230/50/60AC,LIDEW-2,LIDEW-2 F12A,LIDEW-2/B F12A,LIDEW-2/BF 10 X12A,LIDEW-2/F 10 X12A,LIDEW2-1/E-IX 24DC,LIDEW2-2/E-IX 24DC,LIDEW-3 10,LIDO-2 10,LIDO-3/E,LIMHA-1/210-IX 24DC,LIMHA-1/350-IX 24DC 31,LIMHA-2/210-IX 24DC 31,LIMHA-2/350-IX 24DC 31,LIMHA-3/350/V-IX 24DC 40 X12A,LIMHA-3/350-IX 24DC 40 X12A,LIMHA-4/350/V-IX 24DC 32 X12A,LIMHC-2/350-IX 230/50/60AC 31,LIMM-1/210,LIMM-1/P/350,LIMM-2/210 20,LIMM-2/350 20,LIMM-3/350 40 X12A,LIMM-3/350/V 40 X12A,LIMM-4/210/V 31,LIMM-4/350/V 31 X12A,LIMM-5/100/V 31,LIMM-5/350 31,LIMZA-A-1/180/M 20,LIMZA-A-3/180/M 40,LIMZO-A-3/210,LIMZO-A-4/210,LIMZO-A-5/315/P 30,LIMZO-AE-4/315 10,LIMZO-TER-4/210 50,LIMZO-TER-4/210/I,LIQV-2 20,IQV-2/K,LIQZO-A-252S4,LIQZO-L-252L4 50,LIQZO-L-322L4 50,LIQZO-LE-402L4 50,LIQZO-LE-502L4 50,LIQZO-LE-632L4 51,LIQZO-T-252L4,LIQZO-T-252L4 50 /PE,LIQZO-T-322L4 50,LIQZO-T-402L4,LIQZO-TE-322L4 50,LIRA-1/100 20,LIRA-1/210 20,LIRA-2/210/V 20,LIRA-3/100,LIRA-4/210/V 11,LIRZO-A-1/210,LU-02C-UX 230RC,LU-02C-UX 24DC 26,LU-03A-UX 24DC 26,LU-03C-UX 230RC 26,LU-03C-UX 24DC 26ATRLE-10-4X ATRLE-20-4X AGRLE-32 HR-011 11 HR-012-50 JPR-212 16 JPR-312 16 KR-012 35 HMP-015/210 HM-011/350 AGIR-10/210 AGIR-20/210 AGIRR-10/210 51 AGIRR-20/210 51 HG-031/210 23 HG-036/100 23 JPG-211/210 KG-031/210 KG-033/210 20 AGAM-10/10/350/V-I-X-24DC  AGAM-10/11/350-I-X-25DC  AGAM-10 210 AGAM-20/10/350-I-X-24DC DIIZO-TE-073-D3-1 DKZOR-TE-173-S DPZO-A-273-S5/D DPZO-AE-2-73-D-3-I-G  DPZO-AE-2-73-S-5-I-G PVT-322  AGIR-10/100  PFG-218  PFG-142   PVT-220/140  PFR-202  E-M1-AC-01 EMAP-40/H14  MAP80  MAP320/H12  PVT-322/70  PFC-120  DHI-0711/SP-6-67-24DC  DHI-0631/2/SP-667-24DC  DHI-0713/S-667-24DC  SP-HP-65/A10  SP-HP-135/A10  DHI-0714/13 DHI-0710/13  E-ATR-6/400/I MAP-040/20  E-ATR-6/400/I  KM-014/210  HQ-012  KR-014   DK1-1631/2 220V SP-666 SP-666/A SP-ZM-7P  DKI-1711 DPZO-AE-3-73-D-5-I-G  DPZO-LE-2-73-D-5-I-G   KM-015/350   DHI-0613/2-X-24DC  DHI-0713/X-24DC   DHI-0731/X-24DC   DHI-075-1/2-X-24DC   DHI-1-71-3-X-24DC   DLOH-3A-U-X-24DC   DLOH-3C-U-X-24DC   DLOH-3C-O-X-24DC   DPHI-2-63-1/2/H-X-24DC     DPHI-2-71-3/H-X-24DC   DPHI-2-75-1/2/H/D-X-26DC    DPHI-3-71-3/H-X-27DC   DPHI-3-75-1/2/H-X-28DC 
電磁閥線圈 
SP-CAI-110/50/60AC/80 SP-CAI-230/50/60AC/80 SP-CAU-110DC/80 SP-CAU-220DC/80 SP-CAU-230RC/80 SP-CAU-24DC/80 SP-COI-110/50/60AC SP-COI-230/50/60AC/80 SP-COU-110DC/80 SP-COU-12DC/80 SP-COU-220DC/80 SP-COU-230RC/80 SP-COU-24DC/80 
SP-G1-CK-160/110 SP-G3-CB-9-250/140 SP-G3-CB-9-320/180 SP-G3-CB-9-80/45 SP-G3-CB-9-80/45 CS3148 SP-G3-CI-100/45 SP-G4-CK-80/45 SP-G8-CK-100/70 SP-G8-CK-125/56 SP-G8-CK-200/140 SP-G8-CK-200/140 SP-G8-CK-32/14 SP-G8-CK-32/22   SP-G8-CK-40/28 SP-G8-CK-50/22 SP-G8-CK-50/36 SP-G8-CK-63/45 SP-G8-CK-80/36 SP-G8-CK-80/45 SP-G8-CK-80/56 SP-G8-CKP-160/110 SP-G3-CI-50/36 ADR-06 ADR-06/2 ADR-06/4 ADR-06/8 ADR-10 ADR-10/2  ADR-10/2/12   ADR-10/2/15 ADR-10/2/20   ADR-10/2/22 ADR-10/4 ADR-10/8 ADR-15 ADR-15/2   ADR-15/4    ADR-20   ADR-20/2 ADR-20/4 ADR-25 ADR-25/2 32 ADR-25/4 ADR-25/8  ADR-32 31 ADR-32/2  
ADR-32/4 31 ADRL-10 40  ADRL-10/2 40 ADRL-15 40 ADRL-20 ADRL-20/2 ADRL-20/8 40 ADRL-32 ADRL-32/2 AGRL-10 AGRL-20  AGRL-32 41 AGRLE-10 AGRLE-20  AGRLE-32
先導式溢流閥  
AGAM-10/10/100 34 AGAM-10/10/100-IX 230/50/60AC 34  AGAM-10/10/100-IX 24DC  
AGAM-10/10/210  AGAM-10/10/210/V-IX 24DC  AGAM-10/10/210-IX 230/50/60AC
AGAM-10/10/210-IX 24DC  AGAM-10/10/210-IX 24DC 34/WG  AGAM-10/10/350 34
AGAM-10/10/350/V-IX 24DC  AGAM-10/10/350-1X 24DC 34 AGAM-10/100
AGAM-10/100/V  AGAM-10/11/100 34 AGAM-10/11/100/7PA-M-AO 24DC  AGAM-10/11/100-IX  AGAM-10/11/210-IX AGAM-10/11/210-IX 24DC  AGAM-10/11/350/PA-GK-AO 24DC 22 AGAM-10/11/350-IX 110/50/60AC AGAM-10/11/350-IX 24DC  AGAM-10/20/210/100-IX 24DC AGAM-10/20/350/100-IX 230/50/60AC 34 AGAM-10/20/350/210/V-IX  AGAM-10/20/350/210-IX 230/50/60AC 34  AGAM-10/20/350/210-IX 24DC 34 AGAM-10/21/350/100-IX 24DC 34 AGAM-10/21/350/210-IX 230/50/60AC 34 AGAM-10/210  
AGAM-10/210/V 34  AGAM-10/22/100/100-IX 24DC 34 AGAM-10/350 AGAM-10/50 34 AGAM-20/10/100/V-IX 24DC 53 
AGAM-20/10/210/V-IX 24DC 53  AGAM-20/10/210-IX 230/50/60AC  AGAM-20/10/210-IX 24DC  AGAM-20/10/350-IX 230/50/60AC
AGAM-20/10/350-IX 24DC AGAM-20/100  AGAM-20/11/210/M-AO 220 21 AGAM-20/11/210/V-IX 24DC 53  AGAM-20/11/210-IX 230/50/60AC  AGAM-20/11/210-IX 24DC AGAM-20/11/350-IX 24DC 53  AGAM-20/210  AGAM-20/210/V 53 /WG AGAM-20/22/350/350-IX 24DC  AGAM-20/350  AGAM-32/10/210-IX 24DC  AGAM-32/10/350-IX 24DC  AGAM-32/20/210/210/V-IX 230/50/60AC 53  AGAM-32/20/210/210-IX 230/50/60AC AGAM-32/20/350/210-IX 24DC 53  AGAM-32/210 53  AGAM-32/350  AGAM-32/350/V 53 ARAM-20/10/100/V-IX 110/50/60A  ARAM-20/10/210-IX 24DC 72  ARAM-20/100 72 ARAM-20/210  ARAM-20/350 72  ARAM-32/11/210-IX 110/50/60AC  
--直動式順序閥 
AGIP-10/150 50  AGIPR-10/150 50  AGIPR-10/35 50  AGIS-10/350 12  AGIS-10/350/V  AGISR-10/100  AGISR-10/210  AGISR-20/100 12  AGISR-20/210  AGISR-20/350 12 AGISR-32/350 13  AGISR-32/100 13
先導式減壓閥
AGIR-10/100  AGIR-10/100/V 51  AGIR-10/210   AGIR-10/210/V  AGIR-20/100 51 AGIR-20/210  AGIR-20/210/V 51   AGIR-20/350/V  AGIR-32/100 41   AGIR-32/210 41 AGIRR-10/100 51   AGIRR-10/100/V  AGIRR-10/210 51  AGIRR-20/100 51  AGIRR-20/210 51   AGIRR-20/350/V 51  AGIRR-32/100 41   AGIRR-32/210 41
先導式卸荷閥
AGIU-10/10/100-IX 230/50/60AC 16   AGIU-10/10/350-IX 24DC   AGIU-10/100/V 16 AGIU-10/11/100/D-IX 24DC 16   AGIU-10/210   AGIU-10/210/6/D  AGIU-10/210/D  AGIU-10/210/DV  AGIU-10/350/D  AGIU-20/10/100/D-IX 24DC   AGIU-20/10/210-IX 24DC   AGIU-20/100   AGIU-20/210 16   AGIU-20/210/V 16   AGIU-20/350/D  AGIU-32/10/100/V-IX 230/50/60AC 16   AGIU-32/10/100-IX 230/50/60AC   AGIU-32/10/210-IX 24DC 16   AGIU-32/P/100 16  
節流閥 
AQFR-10   AQFR-15   AQFR-20   AQFR-25   AQFR-32 40
直動式溢流閥 
ARE-06/100 43 ARE-06/100/V ARE-06/210 ARE-06/350 43 ARE-06/350/V 43 ARE-06/350/VS 43 ARE-06/500 ARE-06/500/VS 43 ARE-15/15 44 ARE-15/15/V 44 ARE-15/150 ARE-15/150/VS 44 ARE-15/250  ARE-15/250/V ARE-15/250/VS  ARE-15/75 ARE-15/75/V 44  ARE-15/75/VS 44  SP-CART ARE-15/150 44 ARE-15/150/V ARE-15/250 44 SP-CART ARE-15/75 44 SP-CART JPQ-2 SP-CART M-3/100 20 SP-CART M-3/210 20 SP-CART M-3/350 20 SP-CART M-5/100  SP-CART M-5/210   SP-CART M-5/350 SP-CART M-6/100 12 
SP-CART M-6/210 12 SP-CART M-6/210/V 12 SP-CART M-6/250/F SP-CART M-6/350 SP-CART M-6/350/RS SP-CART M-6/50 12  

 AGAM-20/11/210/M-AO 220 21阿托斯