产品详情
超短货期!*!德国WIKA 7666833 111.10.100
超短货期!*!德国WIKA 7666833 111.10.100
超短货期!*!德国WIKA 7666833 111.10.100
公司总代理品牌:
德国BEDIA 水平传感器,温度传感器;芬兰NOKEVAL 传感器变送器数显表;英国HEPCO(摩西)轴承,导轨,滑块等;德国LENORD+BAUER(兰宝)编码器、LENORD+BAUER 传感器;法国RADIO-ENERGIE(雷恩)编码器-测速电机、RADIO-ENERGIE 离心开关;德国TWK 编码器、TWK 传感器;美国WEBER(韦伯)传感器;德国WAYCON 传感器;德国WEIGEL 电流表,电压表(代理品牌);德国FRIZLEN 电阻等;瑞典HEMOMATIK 传感器;意大利ELCIS(艾西斯)编码器等等。
公司的优势品牌(部分):
德国SIBRE 制动器;德国JAHNS(雅恩斯)液压马达,分配器等;德国SWAC 控制面板; 德国BENDER(本德尔)监视器,绝缘监视仪等;德国BERTHOLD(伯托)探测器检测仪等;德国HUBNER(霍伯纳)编码器;德国HBM;德国SMW;德国SCHUNK;德国HYDAC(贺德克)传感器、HYDAC 压力开关、HYDAC 温度继电器;德国EMG(易安基)执行机构,伺服阀,放大板等;美国MOOG(穆格)伺服阀,比例阀,控制器,驱动器等;德国BAUER(保尔)电机,减速机,刹车等;德国HEIDENHAIN(海德汉)编码器;
德国WENGLOR 传感器;美国BETA 检测器;美国H2W 电器元件;美国MAGTROL 传感器,开关,可编程控制器等;美国DELTA 温控器等;美国NEXEN 刹车片,离合器,制动器,摩擦片等; 日本NSD 编码器、控制器、交换器、定位译码器(ABSOCODER)等;瑞士BESTA 浮球开关,液位开关;瑞士MONTECH 气缸;瑞士METO-FER 接近开关;西班牙LIFASA 电容器(LIFASA 电解电容)等;意大利ROLLON 导轨,滑块,轴承;英国SIRCAL 氩气净化器(MP-2000),空气清洗机,钛合金管,分子筛管,辅助加热板等;德国ZIEHL-ABEGG(施乐百)风机,风扇;德国ECKART 油缸;德国FRAKO 电容(FRAKO 低压补偿电容器)等;德国HUBTEX 叉车配件;德国IVO(IVO BAUMER)编码器;德国JVM/JOST 电机;德国MAHLE(马勒)滤芯,过滤器;德国VEM 电机; (*)德国VSE 流量计;德国BARKSDALE(巴士德)传感器、开关;德国FSG 传感器编码器信号转换器;德国GESTRA 阀门,流量计等;德国GRECON 电机; 意大利LAUMAS 称重传感器;德国SIEMENS 6DD 系列模块;德国HONSBERG(豪斯派克)传感器,流量开关, 流量计, 液位开关, 变送器, 流量检测器, 控制仪表等;德国BAUSER(宝色)计数器;德国HAWE(哈威)阀;德国HERZOG(赫尔佐格)转换器,接近开关,铣床,磨床,气动阀,税控发,齿轮箱等;德国NEIDLEIN 机床*;德国KOBOLD(科宝)流量计,流量开关,压力开关,液位开关等;德国KUBLER (库伯勒)编码器;德国PHOENIX(菲尼克斯)继电器插头;德国SCHORCH(啸驰)电机;德国WATT(瓦特)电机;德国ARIS 执行器;德国ARI 阀体;德国ASM 位移传感器,拉绳传感器,编码器;德国BRIDGESTONE 软管;德国BUBENZER 制动器,刹车,联轴器;德国EBM BROSA 传感器,角度仪,放大器等;德国ELAU 电机,控制器,调速器,驱动器等;
德国PINTER 压力开关,传感器,压力计;德国SVENDBORG 制动器,离合器;德国SUCO 压力开关,真空开关,监测器,压力变送器,插头,机械位置开关等;德国STORZ 气缸;德国SICK(思克)扫描仪;德国TURCK (图尔克)传感器,开关;德国TIPPKEMPER MATRIX 传感器、光电开关、接近开关、光电管等;美国BALDOR(葆德)电机马达;美国BOSTON 减速机电机马达;日本KURAMO 电缆等;日本NESSTECH 仪器仪表;瑞士BESTA 液位开关、浮球开关、传感器等;瑞士COMETAG 仪表;英国MODULOC 冷热金属探测器,激光测距仪,金属检测器等。
WIKA 7745916 111.12.05
WIKA 7666833 111.10.100
WIKA 8800478 111.12.050
WIKA 7745916 111.12.05
WIKA 7666833 111.10.100
WIKA 8800478 111.12.050
WIKA 7745916 111.12.05
WIKA 7666833 111.10.100
WIKA 8800478 111.12.050
WIKA ECO-1 0-10BAR A-10 (ECO-1 OLD MODEL)
WIKA 232.50 -0.1~0.5MPA 表盘Φ160 G1/2外螺纹 232.50 0...0.6 MPa
WIKA 232.50 0~0.6MPA 表盘Φ160 G1/2外螺纹 232.50 PM 02.02 0...0.6 MPa
WIKA 232.50 -0.1~0.3MPA 表盘Φ160 G1/2外螺纹 232.50 BUT 0…0,4 Mpa
WIKA 232.50 0~1MPA 表盘Φ160 G1/2外螺纹 232.50 BUT range 0…1 Mpa
WIKA 232.50 0~1MPA 轴向前边 M20*1.5外螺纹 表盘Φ100 232.50 BUT 0…1 Mpa Process connection: M20 x 1.5
WIKA 232.50+821.11 0~1MPA 轴向前边 动作整定值0.5MPA 一转换输出,M20*1.5外螺纹 表盘Φ100 PGS23.100 (232.50 + 821.11)
WIKA EN837-1 0-25BAR SERIE 232.50 radial ½” DIAMETER 100
WIKA 9023518 0-25bar S-11 9023518 Model S-11 0 ... 25 bar
WIKA 213.53.63.100KPA.D63.0-100KPA(LM)G1/4
WIKA S#26050WU P#9023526
WIKA 27501055 code 9023526
WIKA S#3723866 P#9023526
WIKA 700.01.080 CONT 851.33 700.01.080 1,6 BAR 2X G1/4 I. LI/RE 851.3.3 code 12021385
WIKA EN837-1 0-25BAR SERIE 232.50 radial ½” DIAMETER 100
WIKA TYPE:233.50-C-KG398Z-NB-BZHZCZZ-ZZZ 0-10KG 63mm 1/4"NPT 233.50-C-KG398Z-NB-BZHZCZZ-ZZZZ
WIKA Y-100 0-0.01MPa G1/2 Series, 232.50 0..0,06 Mpa (minimum range)
WIKA Y-60 0-25Mpa G1/4 Series, 232.50 0…25 Mpa dial dn63 ¼” gas
WIKA Y-100Z-J 0-1.6MPa M20*1.6 Series, 232.50 0...1.6 MPa
WIKA Y-100Z-J 0-1MPa M20*1.5 Series, 232.50 0..1 Mpa
WIKA YTN-60 0-16MPA G1/4 Series, 232.50 0..16Mpa dial dn63 ¼” gas
WIKA LSD-30,0-309MM,P#14041607,S#1104J3LR,15-35V,MAX:3bar LSD-30 0 ... 309 mm CODE. 14041607
WIKA 909177 材质316 -910.10 HAHN MUF/MUF G1/2 CW614N PN25 M.PRUEF-FLA D40*5 CODE 9091777
WIKA IS-21-S-BBQ-86-A1ZGM4ZUZ1-ZZZ-IP67 IS-21-S-BBQ-86-A1ZGM4ZUZ1-ZZZ code 12890848
WIKA N-10-A-BBS-..-ZGM4ZN-ZZ P#:121889434 S#:260Q9A0 请核实是否为 N-10 PE 81.26 0 ... 400 bar G 1/2 B
WIKA S-10 0-40BAR G1/4 Model S-10 0 ... 40 bar DC 10 (14) ... 30 V 4 ... 20 mA, 2-wire
WIKA S-10 0-10BAR G1/4 Model S-10 0 ... 10 bar DC 10 (14) ... 30 V 4 ... 20 mA, 2-wire
WIKA S-10 0-60BAR G1/4 Model S-10 0 ... 60 bar DC 10 (14) ... 30 V 4 ... 20 mA, 2-wire
WIKA TYPE PSD-30 0-100bar P#13233584 S#1104PUNF code 13233548
WIKA IS-21-S-BBQ-86-A1ZGM4ZUZ1-ZZZ-IP67 IS-21-S-BBQ-86-A1ZGM4ZUZ1-ZZZ code 12890848
WIKA S-10-A-BBS-GB-ZGA4ZAZ-ZZZ
WIKA 733.51.100 CONT 831.2 需要提供压力范围以及安装方式
WIKA 612.20; 0…250 mbar(Rp 1/2") Typ: 612.20
WIKA 612.20; 0…250 mbar(Rp 1/2") Typ: 612.20 Art Nr.9071687
WIKA 213.53.100 0-40MPA
WIKA S-11 14~30DCV 0~160Bar 0~10V Model S-11( 0-10 V, 3-wire,0-160 bar,14-30 V DC, -30 ... +100 °C (-22 ... +212 °F)
WIKA EN837-1 0-25BAR SERIE 232.50 radial ½” DIAMETER 100
WIKA S#260SE46 P#8363175 0-10bar Model S-11,0~10 bar,code 8363175
WIKA Transmitter s-10 code 9073981,Model S-10 (891.23.510) DC 10 (14)~30 V,0~400 bar,-30~+100 °C 10...30 V DC
WIKA Transmitter s-10 code 9073981,Model S-10 (891.23.510) DC 10 (14)~30 V,0~400 bar,-30~+100 °C 10...30 V DC
WIKA IS-21-S-BBQ-86-A1ZGM4ZUZ1-ZZZ-IP67 IS-21-S-BBQ-86-A1ZGM4ZUZ1-ZZZ code 12890848
WIKA A-10,0-1Bar,4-20ma Model A-10 0...1 bar PE 81.60
WIKA TR30-W-Z 0-150℃ 4~20ma TR30 RTD -50...+150 °C 4...20 mA TE 60.30
WIKA A-10 0-10BAR O/P:4-20MA P/N:14003451 S/N:1105J8YE Model A-10 PE 81.60
WIKA Type 233.50.100 cont 821.12 switchGAUGE PGS23.100 ( 232.50.100 + 821.12)
WIKA A-10,0-1Bar,4-20ma Model A-10 0...1 bar PE 81.60
WIKA TR30-W-Z 0-150℃ 4~20ma TR30 RTD -50...+150 °C 4...20 mA TE 60.30
WIKA SC15608S205-0 是否为SC15
WIKA PGS23.160E+831.21+990.12 PTFE PGS23.160 + Model 990.12
WIKA T12.10.000 Tamb:-40℃—85℃ 输入:Pt100 3L/w/f DC 9-36V 输出:4-20mA 0-250℃ T12 250°C data sheet: TE 12.03
WIKA 0-2.5bar CL1.6 213.53 series,Scale 0 ... 2.5 bar dial with colored sectors,Lower mount ¼ "gas
WIKA C-10+DI15,0.25bar,G1/4" A,4-20mA Model C-10,Pressure range: 0 ... 0.25 bar,Process connection: G 1/4 B,Power supply: 10...30 V DC + model DI15,Power supply: DC 9 ... 28 V
WIKA 233.50.100 0-600mbar 233.50.100 0-600mbar , ½” gas bottom
WIKA 233.50; NG 100; 0-6 bar; G1/2B connection: below 232.50.100 0…6 bar
WIKA 233.50; NG 100; 0-6 bar; G1/2B connection: below+830.E1 232.50.100 ,Scale range: 0...16 bar,Process connection: G 1/2 B,Connector location: lower mount + Electronic Sensor model 830E,first switch operation: makes (1)
WIKA 232.50; NG 100; 0-16 bar; G1/2B connection: below 232.50.100,Scale range: 0...16 bar,Process connection: G 1/2 B,Connector location: lower mount
WIKA S-10 0-40BAR G1/4 Model S-10 0 ... 40 bar DC 10 (14) ... 30 V 4 ... 20 mA, 2-wire
WIKA S-10 0-10BAR G1/4 Model S-10 0 ... 10 bar DC 10 (14) ... 30 V 4 ... 20 mA, 2-wire
WIKA S-10 0-60BAR G1/4 Model S-10 0 ... 60 bar DC 10 (14) ... 30 V 4 ... 20 mA, 2-wire
WIKA S-10 0-40BAR G1/4 Model S-10,Pressure range: 0 ... 40 bar,Power supply: DC 10 (14) ... 30 V,Output signal: 4 ... 20 mA, 2-wire
WIKA S-10 0-160BAR G1/4 Model S-10,Pressure range: 0 ... 160 bar,Power supply: DC 10 (14) ... 30 V,Output signal: 4 ... 20 mA, 2-wire
WIKA S-10 0-10BAR G1/4 Model S-10,Pressure range: 0 ... 10 bar,Power supply: DC 10 (14) ... 30 V,Output signal: 4 ... 20 mA, 2-wire
WIKA 13458711 code 13458711
WIKA A-10 0.1-1.6MPA 4-20MA 8-30V Model A-10,Pressure range: 0...1.6 MPa gauge,Output signal: 4 ... 20 mA, 2-wire,Power supply: 8...30 V DC
WIKA TYP233.50.100 NR:73475620602 0-25bar Model: 233.50,Nominal size: 100 mm,Scale range: 0...25 bar
WIKA PSD30 Model PSD-30,Pressure range: 0...6 bar gauge,Process connection: G 1/2 B,Power supply: 15...35 V DC
HARTING 0999 000 0021
SLAVKOV U BRNA 3COA2-17H P1
WEIDMULLER 7760054115
SICK DME4000-212
E+H FMU90-R11CA132AA3A
HYDAC EDS3451-250-000
HYDAC 0240R003BN3HC/-KB
BAUER BG10-81/DU05LA4-ZW-S/E003B4HN
K+N KG160 T103/D-A075 STM 4EQ384A36
MOOG D664-4003 LO5HABF6NSM2-O D061-9311 J15KOBA4HN1
品牌 规格型号
MOOG D664-4003 LO5HABF6NSM2-O D061-9311 J15KOBA4HN1
IFM OGS700
RITTAL SK3303100
HYDAC EDS1691-T-C-400-000
AEG 2P400-495HF
MTS 201542-2
HEIDENHAIN 323897-03 3m
ALMATEC AH40EEE
MTS RHM1310MK101S3B6105
HYDAC 0060D010BN4HC
B+R 3AI350.6
HEIDENHAIN 606684-04
BARKSADLE SW2000/10B/2SP/G14E/F/0-10BAR
NORD SK80L/4 CUS IG12
SAPELEM suction 1/4 84.040 (80.040.20.F14.1 NBR)
REXROTH MSK040C-0600-NN-M1-UP1-NNNN R911306388
E+H 51512085
FAMATEC 02.006.052 D=63H=20
ASM WS10-1000-420A-L10-SB0-D8
IFM PN7002
REXROTH R911296634 CSH01.1C-SE-EN1-NNN-NNN-S1-S-NN-FW+R911297901 FWA-INDRV*-MPH-02VRS-D5-1-NNN-NN
FUCHS F5;module;added filter
VERDER VA50 PP PP TF TF 810.4033
GOPA KE160-80;CAL2006772
E+L 00355805 FS4105 LED光源
HYDAC EDS3346-1-0016-Y00-F1
NOVOTECHNIK TR-0010
E+H CPK9-NHA1B
HEIDENHAIN 689697-18
TURCK RSSW-RKSW451-18M/6.0
GEMU 4222S01Z200603000
BORRIES KGT-F-12-10-230-S
ADDA IEC/EN/60034
FRIEDRICH FE 1300-6-7.0 EEx el3kW
HEIDENHAIN 323897-03 3m
BONFIGLIOLI VF/VF30/44 F2 P63B14
E+H PMP131-A1601A1S 0.1MPA 螺纹20*1.5
EFS M0865
SCHUNK PGF 80 AS 340371
SITEC 719.0115-K 500 bar, R1/4",DN=4
SONTHEIMER RL020/3PM-D1/Z33 S/H11
PHOENIX HC-B 24-TFL-H-O1PG21S - 1460206
DEMAG 93129646 DC-COM 2-250 1/1 H4 V6/1.5
BERNSTEIN MAM-1813-L-1DC125V
DIETERLE 213 links
CONEC 79959A
LAIPPLE KEB M56B4
WINKELMANN GNFZE 160M/3 7.5 kW 110V IP55 V1 1750rpm 立式
KRAUS NAIMER KG315.T103/D-A037.STM
ICAR MLR25L401003583/1-MKSH 10UF AC400V
MTS RHM0320ME021S1G3100
E+H 55S80-UC0B1AC2AGAA
EPCOS MKK480-D-33-01
VISHAY SK 700 ART 157659
OTT 95.600.033.2.6
HOUDEC ED/CCB311-65-C2-MX/H1.5C-H4
ELCIS 7009461 63-952-1000-5-BZ-C-CL-R
TR 314-00009
MURR 7000-13101-3490300
Multi-Contact 01.0443 BP6/25
MTS RHM1655MR021A01
ODU 309.803.151.024.151
COAX VMK 20 NC 5420C210/OP 4-80 64 B;Kondensat 10O度;G 10/0PST4-8B;0-64bar289740-02;Ex ii 2 GD c T4
ORBITFORM 32-002
BYK 4446
BOGE 122718266P
NEIDLEIN 735204
PNEUMAX N331.0B-3/2NC
KUKA 00108092
STAUBLI SBA08.7103
SIME 448200 83169907
SOMMER SB74-180-B
IFM EVT004
PHOENIX 2866161
LAHTI PRECISION RC2C3/1T P1017994
HONIGMANN TS503
SCHUNK MMSK 22-SP HG 4 5523132
KSB BOA-H DN40mm PN16 JL-1040
LEUZE IS 212mm/2NO-4EO
MTS RHM0280MD701S1G1100
MAXON 258727
NOVOTECHNIK P4501A502
PHOENIX FBI10-6
NUSSBAUM 9225SL06033
E+H FTL260-1020
KRACHT VCA 0.2 FA R1V/148 G3/8-F
TURCK MS24-112-R 20-250VAC/DC 40-70HZ 4.5KW
KOBOLD SWK-1.8
TR CE 58M Art.Nr:5802-00023
HUMMEL 7106400000
IGUS 250.09.175
INA NATR 12
SUCO 0159-43314-1-001
ISA RUG-Z-R002-0.1-TK1
TURCK NI35-CP40-Y1X/S100
MTS RHM-0370MP121 S1B6100含磁环及安装附件
BALLUFF BTL5-F-2814-1S
ARCA 827A.E2.AB0.M10.G
JENOPTIK 537855 CFM/SENSOR
MULTI CONTACT EG-TS-M63-150/4-5
B+R 3AI775.6
SALTUS DC-3A AX(50-200mm)
GARDASOFT LFC 602
THALHEIM OADM260I1620/S14C SER.NR:7365532
PHOENIX 1507777 SACC-M12FSB-5CON-PG9 SH AU
HARTING 6e-m-s 09 33 006 2701
DYNAPAR A125001434A2D
GEA UT40 CDS-10
GASBECHNIC GT50-30/90T20 S8 16302411/C3797/13272 U220-240V 50/60HZ
Felsomat 438872
LEINE+LINDE 01300320
WAM S2525132B75+XUC050B1
PARKER GFG2PKC18V-10
HYDAC ZBM300
K+N CA10-A004-600E
WENGLOR OY1P303P0102
LOWARA PLM90BG/322
NORELEM 03089-5105
EMG LLS1075/02 LICHTBAND 17W 24DVC IP65
NUSSBAUM 9225SL06033
KRAUS+NAIMER CG4-1 DE11B42279/000100 A550
FRIZLEN FZMU200*45
MAXON 43.032.000-22.00-133
BURKERT 00062695
KROHNE DW182/RR/A/K1 20...160l/h M11K14FS427-FS 447006256.10.03
MTS 560778
MTS RHM0220MD601V01
MACRO GHSIR 750-250
RIEGLER D/G 0.65 TUV SV10 882 8
HANSAFLEX BZLMW 04
ALBERT Type:SGT 30124 Manu Nr:70835
KSB 订货号:1351666 VF15/5B
IGUS 250.09.175
PHOENIX IBS IL 24 BK-T/U-PAC - 2861580
LEYBOLD 971423100
BUCHER RKVE-G-08-02-VD
BURKERT 8320-10BAR 4-20MMA Part no.563780
VOGEL 电机 MFE5/BW7 380V/50HZ
WOODWARD Kernal Power Supply Module:5466-1049
ELCIS 115R-360-824-BZ-B-CM-R
BECKHOFF AX2020-B110-0000
SOMMER BDFG20380
EUGEN SEITZ 14C80 171.046.230R55
LEYBOLD COMBIVAC CM51 接口 : CF35
P+F ML4.2-8-H-20-RT/40B/95/110 M8 7-20MM
RIETSCHLE 600087-0000
MTS RHM1520MD531P102
SCHUNK DPG+100-1 304331
RIEGLER DN 8. 0.3-1.2 bar.226.01 - 3.5 BAR
SCHNEIDER FRANCE RHK411M AC220V
SOR 12NN-N66-N4-B1A
FERRAZ FR10GB69V3
KUBLER 8.5020.0320.1024.S090 5-30VDC 150MA S-033400003
SOR 6BH-EF2-M4-C2A-50-210 120105988
HEIDENHAIN 393000-03
MTS RHM0700MP071S1B2100
SOR 5NN-K5-N4-F1A-X373
PREMOTEC BL58-50W 432201658023 24V
REXROTH PSG3075.10AZ
TWK CRD105-4096R4096C2Z01
VERSA Vgg-4422-u-240含线圈
B+W BWU2620
SCHUNK PZN-Plus 200-1
PARKER PV140R1K1T1NMMCX5899
RADIO-ENERGIE TYPE RE.O444 N1B 0.06 EG
WURTH 7037121
MTS RHM0050MD531P102
MENZEL 9100000005
ZF 4161 232 049
LENZE MCS06F41-RS020-A11N-ST5S00N-R2S0
JENSEN MQA-3G2-8535B684KA MADEINDENMARKLEADFREE055210-4 07_10
WEIDMULLER 7760054114
TURIAN GR 20 RH 40bar 170°C3000RPM
MARTENS MU500-51-5
E+H CCS141-N
AEG LS27 NR:910-301 582-55
BURKERT 5282A32 OFKM VA NO:00134529
SCHNEIDER ATV312HD11N4
FP Hydraulique HDE 2ED1BHA6-2390-45-00
HEIDENHAIN 643307-02
NIPPON GEAR HRF-52MEK2
PHOENIX PLC-RSC-24DC/21
ABNOX Art-Nr.4062100 i=25:1 PA/s-Nr.20134/0739 2-10bar
ARCA 827A.E2-000-M1
BURKERT 00133171 W37LS 24VDC 11W
MAHLE 77680085 PI 1108 MIC 10
P+F PVM58N-032AGROBN-1213
NEIDLEIN 735204
HEIDENHAIN 1RN1331.061-1024 ID:538727-05
BINKS 250612
GARDASOFT LFC 602
MOOG G631-3006B/H75JOFM4VBR
WIKA 632.50.100 表盘直径:50mm 量程:0~-25mbar 接口螺纹:M13.11×19(英制55度)
OTT 354533
RITTAL SK3108.100
FUCHS IFEU52 烟雾过滤器预过滤垫
SCHUNK PGN-PLUS 200-1-AS NR:0371405
KLEINMICHEL 0.01010.66
HYDAC KHB-20SR-1112-01X-A
VAHLE ST-LT/LTE10(1) 165 114
B+W BWU2617
VAISALA DMT143-G1C1A1A4A0ASX
BARKSDALE XT-R12 0221-357
BKD 0.75D2EXEKR3-02FG27HF4,16-2;0-340MIN-2;2515NM
MUEGGE MB2568A-120CH
BARKSDALE UPA2-43-015611201
KUBLER 8.A020.3532.1024
MUEGGE MX3000X-125KL
BURKERT 订货号:00255726
MAYR 60/381.021.0/4/82
BARKSADLE SW2000/10B/2SP/G14E/F/0-10BAR
TITAN 120001-6083
WENGLOR Y1TA100QXT3
FLUTEC DVE-10-01.1/0
ASTEC LPQ252-CEF
HBM PX401
ELCIS X115-1024-10305-BZ-N-CW-R-03
LESER 4594.2142
NORELEM 02153-10058
SUCO 0166 40704 028
SCHUNK 30039246
BILSING 80-40HT-F-55