德国ADDA Type FC 80 FECC-8电机
同时,计算机制造集成系统(CIMS)和虚拟技术的应用,大大地缩短了泵产品的生产周期,保证了产品的性能。水泵无密封泵技术无密封泵主要包括磁力驱动泵和屏蔽泵。近年来,其之所以引人注目,主要是由于2世纪8年代中期以来人类环保意识的日益增强。目前,越来越多的泵制造厂认识到了在其化工泵产品系列中需要增添一种无密封泵的重要性。显而易见,无密封泵的需求量将呈持续增长的强劲势头。未来泵理论与设计方法的科学化加强泵的基础理论研究,注重交叉学科、边缘学科、新兴学科的相互渗透。
Turck BLCDP-4M12MT-4AI-VI Nr:6811167
MD MICRODETECTORS MDI58C 2304
BECKHOFF C9900-E209
GMW SASK 31.5
BANNER SMA95RFQD
Eaton Moeller 186194 C22-WS-MS1-K10-P1
CASAPPA 02004643 PLP20.11,2S0-82E2-LEA/EA-N-EL-FS
MD MICRODETECTORS AT1/CP-1A
OMRON 61F-GP-N8H 220VAC
UNIVER W1310400080M
OMRON G7L-1A-P 200/240VAC
SPERONI VSI20-5F SUS304
NANOTEC ST2818S1006-A 2.66V 0.95A
Turck PS010V-504-LI2UPN8X-H1141 Nr:6832841 压力传感器
HPI P1CBN3071HE2018HE2018HL20C04N
Turck WAKS4-8-WASS4/S366 Nr:8024218
BURKERT 电磁阀360645
UL USTED IND.CONT.EQ SDN 205-24-100P
LAMBRECHT 00.14577.100.010
LENORD+BAUER GEL 260C-000000B011
SCHNEIDER 140ERT85410
AirCom F20-04WG
J.A.WOOLLAM M-2000UI
ZIMMER UBPS 4502 DS1L
小强工控 CARLO GAVAZZI RA2450LA06
Turck BL67-8DO-0.5A-P, Nr:6827172
KEYENCE GT2-A12 感应传感器
KEB 0706450-4007
FINDER继电器93520024
FINDER Type: 56.32 Contact: 12A AC 250V
UNIVER S1004250175
VIVOIL齿轮泵X2R4301EOOF
LAPPORT FORM 9011 20x20x200 Nr. 509 油石
WEG 180L-04
MD MICRODETECTORS AES/AN-1F
OMRON A22NN-MMM-NGA-G122-NN
MOOG GmbH D661-4651/G35J0AA6VSX2HA
BANNER TL50BLB1
OMRON A22NL-RPM-TYA-G002-YD
OMRON J7KN-115 48
OMRON CJ1W-ID212
DIMOTION TYP: MP 060 230STD38B CD 6.35 S1 OR SB KE CODE:MPB2030S0004
OMRON MY2 24VAC (S)
MD MICRODETECTORS MDI63F 2792
Eaton Moeller 100547 E67-LRDP100-HDD
DRR132-4B-T
小强工控 CARLO GAVAZZI PS21L-MT11PR-M00
小强工控 CARLO GAVAZZI PS21M-CS11PH-T00
REXROTH R911328490 CSB01.1C-ET-ENS-EN2-L2-S-NN-FW
SELET传感器OCV81/D2PNCC5
BANNER QS18VN6DBQ7
SCHNEIDER LV426509
SCHNEIDER PKY32M414
SCHNEIDER ABE9C1240L05
PARKER D02B2-2.1N
UNIVER M1600120015
Rockwell Automation 20G1F4C920LNDNNNNN-C0 20G1F4C920LNDNNNNN-C0
BARTEC Feam IT25
SCHNEIDER ETK40017
SAT Anlagentechnik 43015977 076504038-999
Bioengineering 54325.1
RIEGLER 217-KD
BANNER BMEL2424A-50509
Stocko Contact MFMP7238-006-063
SCHNEIDER VW3SKR008W10000B
AECO I08000183 SI8-DC2 PNP NO S LC5
LEUZE 426188 PSC-1600-S2
FINDER继电器486180120060SPA
BANNER IVU2PTBB16
hastings 9724
ZIEHL-ABEGG QK10A-2DM.48 FK 0.67KW 230/400V
Maxon 284597
MD MICRODETECTORS MDI63A 759
SCHNEIDER ZB6DGA
OMRON D40ML-P2-U-M12
MD MICRODETECTORS MDI58C 764
Eaton Moeller 218173 M22-XD-S-X7
BERNSTEIN 6310311615 MAK-1113-1
SICK BEF-KHS-N04 :2051610
ROTOFLUX M210-000-03F
ILME ILCKG 03 CN
SUCO 7002.6078
SCHNEIDER MTN5142-0000
SCHNEIDER A9F85670
ILME ILAI C13V12
CASAPPA FP30.61/30.17 S
HPI M3BAN2022CL10B02N
SCHNEIDER MTN4574-6052
eiero typ:junior 1 Nr:120017748
BECKHOFF IP3112-B800
stauff SLWC-M60-1-B450NC-01-01-1-T70NC
Sommer SM4.
CASAPPA 02004733 PLP20.11,2S0-49S1-LOC/OC-N-EL FS
MAXON电机118570
IPF LT100309
DOLD安全继电器55884 BN5930.48/204 AC50/60HZ 48V
OMRON CIMR-VCBA0010JAB
hsb-automation beta-80-sos-m-2250-2295-2720
RELECO CRINT-C115/DC110-125V R
BANNER TL50YRGQ
MD墨迪 PMS/0P-1HM12 shielded PNP conn. M12
RTA MIND A5
LINCOLN 205U1-4KF-L160 NO:664-36939-1
CASAPPA 03705840 FRONT SECTION HDP30.34D0-32S3-LMC/MB-65M1-N-A
倍加福P+F ENA58IL-S10CA5-0013B17-RH2 编码器
SCHNEIDER LOY-LVIS-3E112
UNIVER K1001250370M
norelem 21120-08
SCHNEIDER XUYBAT1CO956S
OMRON FLV-FX143W
德国ADDA Type FC 80 FECC-8电机
GEA尼鲁喷雾干燥机的设计,生产性能,如粒径,堆积密度,水分含量,溶解性,分散性等完全按照用户所希望的。该产品适用于所有可泵送的产品,无论是热还是不热敏感。喷雾干燥机常规的雾化型式有三种:种旋转式雾化、第二种压力式雾化、第三种气流式雾化。旋转式雾化喷雾干燥机的特点是:单机生产能力大(喷雾量大可达2t/h),进料量容易控制,操作弹性大,应用比较广泛。压力式雾化喷雾干燥机的特点是:可以制造粗粒子,维修方便。
BEDIA 420700
Marchel 50 10 01
SCHNEIDER A9P54610
KENDRION OAB513002A00
HYDAC HDL-24;过滤精度/μm:200;通径/mm:600;流量(L/min):1200;压力/MPa:1;工作介质:水
LIKA编码器C80-Y-500BNF230L3 500PPR-L3MT
Dittmer Temperaturfühler GmbH + Co. KG 1XPT100 D04/063515
OMRON XS2F-M12PVC3A5MNLED
Heidenhain ERN1331.051-1024Id.Nr.317393-05
Eaton Moeller 27396 D-K2X240
hydac 0660 R010 BN4HC
BANNER TL50BLZGRAOSCQP
BURKERT 电磁阀352606
Jung L3
BURKERT 电磁阀144816
供应进口法国HPI齿轮泵P1BAN2010CA2010CL10B...
Gefran-2019 F060319 IE2-S-6-M-B05C-1-5-D 2130X000X00
Eaton Moeller 193199 BPZ-KR110/400
maxonNr.310006
SCHNEIDER XVBL6G4
BANNER PBP415UM.5
BANNER TL50ZOC
KUEBLER 8.5820.4512.4096
小强工控 CARLO GAVAZZI CVTDINAV2DC02XX
DOLD安全继电器43973 IP3078.18 AC/DC24V
RIEGLER MSN23911438
SCHNEIDER PRA90083
Eaton Moeller AC25
Eaton Moeller 114823 BPZ-MPL500-400
MD MICRODETECTORS AK1/AN-2A
SELET传感器A01AN5
SCHNEIDER KTB0510CR8
norelem 08910-A1600X16
KNF N86KTE,AC230V,50Hz,0.65A,250KPa,0.060KW
EUCHNER GSBF02D08-552-M
kinetronic PWG 79 S 120-2010-A01
Facon S07PMB500-S 380V/110V(06105)
PEI TEL Communications GmbH cuna 2908-034-000-51 Mic.with flange mounting,excl.connnecto 麦克风
Emhart Teknologies M156 921
OMRON G7Z-4A 24VDC
SCHNEIDER MTN5137-0000
小强工控 CARLO GAVAZZI PD30CNP50NAPS
CASAPPA 66610512 PLP20.8/20.4 S/FS EL
SCHNEIDER ATV320U06N4C
RIEGLER 226.01-7,0
Gefran-2019 F011844 TC1M-A-1-K-5-F-E 005B000X03000XX
GTR GL15N010-LJBR90WC
Eaton Moeller 123735 #NAME?
ZIMMER MKS3001A
Electronicon E62.R20-333C20
SCHMERSAL 103006654 PS116-T11-ST-R200
Stauff "SNK-176V-C-0-12
"
Gefran-2019 F021002 TR6M-B-2-B-C-C-I-C-1 000X000X00200XX
CB111028 DM2D3132065 IGS00131
Eaton Moeller 187342 XALKP-3MM-N
BANNER WLS28-2XR990XQ
SUCO 0161-44114-1-001(100-400bar)
小强工控 CARLO GAVAZZI RP1A40D3
SCHNEIDER MTN288319
LUST FGVH112L-4-R-F-D-C
Gefran-2019 F048381 TC5-M-1-K-6-F-E-A-3 030X000X00015XX
格兰富 8082-19FT100-C 电机
HPI M3CBN1004XA20C01N
Phoenix 1543524 SAC-4P-M 8MS/0,5-950/M 8FS 电缆
FINDER继电器406191104300
Eaton Moeller 222898 T3-4-15107/I2
OMRON CPM2C-8EDM
ODU 196.025.003.300.000
小强工控 CARLO GAVAZZI ICB18S30F08NCM1
HBM T22 5NM 5M线缆
IPF IN306050
MD MICRODETECTORS MDI58G 2402
LEONARD 33200003 GVL 6:1 齿轮箱
HYDAC 0063 RN010 BN/HC
BECKHOFF C9900-M128
OMRON R88A-CRKN010CR-E
ABB 1SBH141001R7539 N33/11-75
SCHNEIDER XMPC12C2374N
Eaton Moeller 290424 RA-XM12-Y
Eaton Moeller RS32H 32A RED SPOT FRONT CONNECTED BLACK
MP Sensor GmbH 25001870 pico vacuum
SCHNEIDER ATV12HU15M3
Rexroth R900028819 TPL-00-K-012-22/1G/VE,
LIKA编码器MMC3612/8192GB-6-L1 SSI D6MM
AECO I12000702 SI12SS-DC4 PNP NO S LC10
RIEGLER 250.35
BANNER K30LXRYNQ
BANNER LEDGA70XD5-XM
BANNER TL50HZGRAOS3CQP
REGO-FIX Hi-Q/ERM20
SCHNEIDER A9F75306
RIEGLER TFB 2A-114
BANNER BWA-9O2-002
MD MICRODETECTORS MDI63G 1073
Honsberg MR1KO1-025GM020
stober FDS4024 B 变频器
BECKHOFF ES3351
SIEMENS 6SL3995-6LX00-0AA0
EM-TECHNIK 1A200MG4014PP DN04/06;G1/4``
parker SCPT-060-C2-05 压力传感器
CASAPPA 03674337 MOTOR HDM30.17D3-34S8-LMB/MC-N
CASAPPA 02019568 PLP20.25D0-03S1-LGE/GD-N-FS
OMRON F3SJ-A0785P20
VIBRO-METER K07.748.2Z
TR ZH65M 175-00003 175
MD MICRODETECTORS MDI58F 2961
Gefran-2019 F043220 WE2-6-M-P15C-1-4-D 2130X000X00
parker PWD00A-400-19
aron AD3E15E
DEMAG GS 26089484 110V…500V~ I≤1A= 5030112
Vesta "532 Magnet Coil MS 24V DC 电磁阀 VESTA E32W1S6
FINDER继电器7F7082301020
Norelem NLM 03108-10 FORM B ---
AMTSCO ETV 7/9 60VA 220V
Turck TS-500-2UPN8X-H1141 s-nr: 6840018
MD MICRODETECTORS MDI63A 2
CASAPPA 71001967 HDP30.51-LME/MC/30.51-LMC-M1 D
SCHNEIDER LC1D186BD
Eaton Moeller 259101 NZMH2-A160
SCHNEIDER NSYCRN55250P
小强工控 CARLO GAVAZZI PS42L-NO11BM-M00
OMRON E39-S65C
LEUZE 50122698 PRK328.3/2N
德国ADDA Type FC 80 FECC-8电机
同时过滤型射频水处理产生的外电场破坏了细胞膜上的离子通道,改变了调节细胞功能的内控电流,影响细菌的生命。同时过滤型射频水处理的射频电场产生的高速运动的电子将细胞冲击致死,达到杀菌的目的。电场处理水过程中,溶解氧得到活化,超氧阴离子自由基、羟基自由基、过氧化氢、单线态氧等活性氧。活性氧对微生物机体产生氧化作用,造成有机体的衰老死亡。过滤型射频水处理器的过滤装置是在自动过滤器的基础上,改进设计而成的一种新型过滤器,具有运行阻力损失小,排污方便,无需设置旁通管路等特点。
Eaton Moeller PV-4A10-1P
SCHNEIDER SDN5810521
JUMO 202545/10-888 888-23-00/015
MD墨迪 CQ55/BN-3Ecubic Plastico DC 25mm NPN NO+NC conn. M12
SCHMERSAL 101210845 SEPG 05.3.4.0.22/95.E1
BERNSTEIN 6502939006 KIB-M30PS/010-KLS12T
OMRON E5CN-HV2MD-500 24VAC/DC
小强工控 CARLO GAVAZZI PS43L-MS11LN-M00
BECKHOFF ZK2020-3334-0005
BANNER SMICC-312
OMRON R88M-K2K030T-BS2
FUCHS MKFSF10 过滤器
Celsa NR.70097-3409(Sonderskala : %) 电流表附件
PEAK-System IPEH-003047
SCHNEIDER XE2SP4151
SETTIMA GR55SMT16B300L.RF3
SCHNEIDER LC1D150LE7
BANNER TL30FYGY
UNIVER S1011400810M
Eaton Moeller 177991
APOLLO 2270281/01-8
SCHMERSAL M3V4D 330-11Y 感应传感器
NORELEM NLM 02020-106
RIEGLER 72.034-22
LIKA编码器C82-H-2048ZCZ442/S630C C82 /S630C
RIEGLER 203.1210-2
HPI M3CBN3020HL30C03V
RIEGLER 130.012-16
OMRON S8VS-12024B
EUCHNER MGB-E-A-100465 ID.-NR:100465
E+H FMU90-R11CA212AA3A
BANNER BRT-40X19A
Gefran-2019 F001194 800-DR0V-00201-000
Mahle AF 6014-005
WALTHER CT-005-2-SL009-02-2
Eaton Moeller 140180
hydrower SHY-E4-W2
MD MICRODETECTORS MDI58C 1500
英国ONDRIVES变速箱和减速器UPHG1.25-50RPH-K
JUMO 702044/88-888-000-23/210
SELET传感器
UNIVER M1000200135M
Eaton Moeller EBH223TBW1 SIZE 2 HOR FSD-100MM BUS, BOT, 2V CLAMPS
Proxitron IKL015.33GH Nr:2319D-20
HPI M2AAN2026HL20C02N
TESEO SRL 6040435
balluff BCS M18KM3-PSC80G-S04G
Gefran-2019 F036142 MK4-A-F-0050-B 0000X000X05X0XX
BECKHOFF ZS1052-6610
MD MICRODETECTORS MDI63F 307
SCHNEIDER A9N18345
MD MICRODETECTORS MDI58F 375
DOLD安全继电器52631 BC7930N.81 AC/DC12V 0,5-10S
Gefran-2019 F046943 TRI-A-5-B-0-C-I 000X000X00400XA
Frizlen FA 3110904 -1 32 / 0 66
OMRON E2A-M12KS04-WA-B1 5M
SCHNEIDER ILA2T572TC1F0
Luwa AN0070.3402L with cable
DOLD安全继电器1917 AI 953N.0082 AC50/60HZ 110V 0,15-3S
OMRON E39-ES18-1
RIEGLER 424.35-SCH
小强工控 CARLO GAVAZZI G82855532
TWK IW 25A/100-0.5-KFN-KHN S/B:579537
LINMOT直线电机PS10-70x240U-BL-QJ-D03
Eaton Moeller 121745 MSC-DE-12-M17(230V50HZ)
OMRON E2ERZ-X8D1 5M
ABB 3BHB010662R0120
EXCELLO X.1009.6805
OMRON H3YN-41-B AC24
OMRON G2R-2-SN-AP3 110VAC (S)
IC ELECTRONIC IC.RC11DA40125 电源2
FINDER继电器322170182300
RAVARINI AUTO 150S RAVARINI
DOLD安全继电器66548 IK7818.38 AC/DC24V 30S/100MS
ILME ILAPD 11
MD MICRODETECTORS MDI63A 2856
Gefran-2019 F011970 TC1M-A-2-J-5-C-E 020X000X00180XX
ODU 026.442.310.420.000
FINDER 86.00.0.240.0000
IPF IB0801T1
LEUZE 50116431 BCL 348i R1 M 100 D
ASHCROFT K3051150
PARKER 2M-C2L-1/3-BN-SS
EMG EVM2-CP/1810.02/L
CASAPPA 02004637 PLP20.4S0-82E2-LEA/EA-N-EL FS
Gefran-2019 F041944 GFX4-30-R-2-0-P
UNIVER K2001600285
小强工控 CARLO GAVAZZI HCM48220V50HZ
Gefran-2019 F018974 TR1M-A-5-B-2-C-E 005X000X00050XA
KINSSON -HYDRAULIK typ JKS-022Q-BO-N Fabr.Nr 132210301
JUMO GmbH & Co. KG 603021/70-1-046-00-0-00-30-13-01-200-8-6/574
BERNSTEIN 4139100219 GDK-R06US/SO0-2,5PU
STEUTE ES 95 W 2S
BANNER Q45BW13FP
00049312 BURKERT 3233-2-0-25,0-AB-VG-SA44-D050 *
SICK SRS50-HZA0-S21,Art-No: 1037395
SCHNEIDER METSEPM5320
TELEMECANIQUE LR2-D1321C
LIKA EC-M10F-LK-A8-10
EMG SPC16.0327
Norelem --- 06320-208
SCHNEIDER ATS48C59Y
HYDAC HDA-3840-A-350-124(6M)
TOGNELLA FT2257/6-100
SCHNEIDER BSH1001P32F1A
SCHNEIDER XMEP100BD21F
seko APG603NHP0800
SCHNEIDER KSC160ED4306
SCHNEIDER SE7656B5045B
VIBRO-METER 111-402-000-013-1-1-020S3960/A1-B1-CO20-D000-E050-F0-G000-H05
SCHNEIDER OVA34652
G&D CATVision-CON A112003
ILME ILPE 3293 SI
SCHNEIDER LV426998
JUMO Typ:8202-27-72,608201/2572-932-17-2000-752-6-000-26-00-0/000
小强工控 CARLO GAVAZZI RSGD6025GGVX210
SCHNEEBERGER NK9-410
Gimatic QC90-B
SCHNEIDER DF2CA005
SCHNEIDER ATV312H055N4412
LEUZE 68016913 MLC500T90-1350H/A
hastings 10-146
SCHNEIDER PCSPWMKIT60A
IPF AM000052
MD MICRODETECTORS MDI63A 2593
SCHNEIDER LC1K1601B7
美国hastings柱上安装夹13698 13701
小强工控 CARLO GAVAZZI FUR-SARR20-20
BAUMULLER DS56-M
SENECA Z-PC-DIN8-17.5
SCHNEIDER XBTZG46
SCHNEIDER VY1A1203
UNIVER S5311501200
SCHUNK 301370
HEIDENHAIN 586653-06
CASAPPA 67051310 PLP20.8-54B2-LBE/BC/20.6,3-LBE/BC S/EL FS
olympus PL/500KHZ-1 MHZ/A S/N L08425
EATON 02-311819\DW-26431 H17SH 040
PAULY PS20G19 stH4 24V
OMRON G3NE-210T-US 12VDC
item 0.0.294.28 输送机用导轨
OMRON CP1W-DA042
LIKA C50-H-1024ZCU48/BS01
SCHNEIDER LV510376
OMRON D4N-1A20R
Rexroth R901049737/VT-VETSY-1-1X/1-2-1-1-0 信号放大器
EMOTRON VFX48-046 54CEB-EAVNNNNAN
FINDER继电器386170605050
Eaton Moeller 254908 NWS-5A12/BL/SH
ATECH 电源 344,24VDC、2A DC/DC模块
Lumberg RST 3-RKT 4-3-224/ 5,0m
RIEGLER TFM 240-20112-S
Siba 2000113.16
G&D/ Guntermann & Drunck GmbH DVIUISION-AR-CPU
BEI IDEACOD编码器GHM510-0014-001
BKD Typ: 0,37D4Exe KR3-02
SCA 83722.300006ADKE80ccm
NORELEM 06241-05
RIEGLER 517.216
FINDER继电器622391254300
INTERNORMEN 01.E 320.10VG.16.S.P. 滤芯
CASAPPA 06865654 LVP 75D-34S7-PSF/VD-N-RP0
brinkmann BFS348/40+001 潜水泵
ZIMMER MKS2001A
IPF MZ0701K4
LABOM BA4220C20593
SCHNEIDER BRS39BWS0066
Microscan GMV-6300-2212G
KARL KLEIN - 81953-1.040
BANNER S22LMXXP
RIEGLER MS251L3812
BANNER LEDRB75X150PW2-XQ
小强工控 CARLO GAVAZZI TSW211115A
Eaton Moeller 140534 MTR-D8-CS
TWK-ELEKTRONIK ZKD-D01
MD MICRODETECTORS MDI63G 587
SCHNEIDER XUB1APAWL5
UNIVER K2001600300
Eaton Moeller 9E15KI
Eaton Moeller 101449 DILM32-XTEPLH
DI-SORIC DCC 04M 0.6 PSLK
BANNER TL50BLY1R2AOS4IQ
CASAPPA FP30.51B0-04S3-LGF/GF-N
PIL P47-150-M18-PNO-2m-B 516686
ELECTRONICON E62-C81-402E10 4μF±10%/DC1200V/AC850V\
SCHNEIDER ZB5AW17C1
Eaton Moeller 91455 EZ-P1
DOLD安全继电器49451 BH5928.92/001/61 DC24V 3S
Honsberg NG-015GA2
SCHRACK PT570024+YPT78110
BECKHOFF ES2502
小强工控 CARLO GAVAZZI UA18CLD05PPTR
EagleBurgmann MG1/75-G60-AQ1EGG for pump type NPG300/400-132/4
SIEMENS 6DD1682-0CE3
Pneumatrol SK7303-A1ND
CASAPPA 03566891 MOTOR KM20.31,5D0-31E2-PGE/GE-N
BECKHOFF ES2088
BARKSDALE XTK-100-F1-31-1 0414-001
SIEMENS 7XP9013-0
Eaton Moeller 241140 FAZT-C6/3NSELET传感器Carta rifrangente Fandis FPF12KUD24B-110 FRAME FAN RAL 7035 SCHNEIDER S520481 unkermotoren GR 42X40 MESA GES-1-L KS10010000PP LIKA编码器SGSD-L-1-64-N-2 SENSORE SGSD 中发工业进口备件 ELFIN 050LQPVDE 230V 50/60 HZ 11WRIEGLER 226.02-22,5Gefran-2019 F037437 GFX-M1-60/480-D-0-RR-P-C0 DOLD安全继电器56704 IL5990 AC/DC24V 10S BURKERT 电磁阀44568
德国ADDA Type FC 80 FECC-8电机
十九世纪中叶出现了机械制冷。雅各布.帕金斯在1834年建造了首台实用机器。它用yimi作制冷剂,是一种蒸气压缩系统。二氧化碳(CO2)和氨(NH3)分别在1866年和1873年被用作制冷剂。二十世纪初,制冷系统开始作为大型建筑的空气调节手段,个全空调高层办公楼。年代出现了-氯氟烃CFCs与含氢氯氟烃HCFCs制冷剂。世纪3年代,一系列卤代烃制冷剂相继出现,将其命名为氟利昂。这些物质性能优良、无毒、不燃,能适应不同的温度区域,显著地改善了制冷机的性能。