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Orinasa OEM ho an'ny Kapasitera Aluminium Can - Kapasitera Sarimihetsika UL Certified ho an'ny Sivana DC (DMJ-MC) – CRE

Famaritana fohy:


Antsipirian'ny vokatra

Marika vokatra

Lahatsary mifandraika amin'izany

Valin-kafatra (2)

Miaraka amin'ny fitantanana tsara dia tsara, ny fahaiza-manao ara-teknika matanjaka ary ny fomba fanaraha-maso hentitra sy tsara dia tsara, dia manohy manolotra kalitao tsara sy tompon'andraikitra ho an'ny mpanjifanay izahay, vidiny mirary ary orinasa tsara. Mikendry ny ho iray amin'ireo mpiara-miombon'antoka tompon'andraikitra indrindra aminao izahay ary hahazo ny fahafinaretanao amin'izany.Kapasitera sivana voltazy avo lenta , Kapasitera Sarimihetsika ho an'ny Rafitra Angovo Vaovao , Kapasitera Sarimihetsika Plastika MetalyMatetika izahay dia miara-miasa amin'ny fahazoana vokatra vaovao mamorona mba hanatanterahana ny fangatahan'ny mpanjifanay manerana izao tontolo izao. Aoka ho anisan'ny ekipantsika ary andao hiara-hiasa mba hahatonga ny fitondrana fiara ho azo antoka kokoa sy mahafinaritra kokoa!
Orinasa OEM ho an'ny Capacitor Can Aluminium - Capacitor Sarimihetsika UL Certified ho an'ny Sivana DC (DMJ-MC) - Antsipiriany CRE:

Angon-drakitra ara-teknika

Elanelana mari-pana miasa

+85℃ hatramin'ny -40℃

Elanelana azo ampiasaina

50μF ~ 4000μF

Voltazy voaisa

450V.DC~4000V.DC

Fandeferana amin'ny capacitance

±5%(J);±10%(K)

Mahazaka voltazy

Vt-t

1.5Un DC/60S

Vt-c

1000+2×Un/√2 (V.AC) 60S (min3000 V.AC)

Voltazy mihoatra ny mahazatra

1.1Un(30% amin'ny faharetan'ny enta-mavesatra)

1.15Un (30min/andro)

1.2Un (5min/andro)

1.3Un(1min/andro)

1.5Un (100ms isaky ny mandeha, 1000 fotoana mandritra ny androm-piainana)

Antony fandroahana

tgδ≤0.003 f=100Hz

tgδ0≤0.0002

Fanoherana ny insulasiôna

Rs*C≥10000S (amin'ny 20℃ 100V.DC 60s)

Fahatarana amin'ny lelafo

UL94V-0

Fahaiza-manao ambony indrindra

3500m

Rehefa mihoatra ny 3500m ka hatramin'ny 5500m ny haavo dia ilaina ny mifandray aminay mba hahazoana vahaolana manokana momba ny famolavolana.

Androm-piainana

100000h(Un; Θhotspot≤70 °C)

Fenitra fanondroana

IEC61071 ;GB/T17702;

endri-javatra

1. Famonosana akorandriaka metaly boribory, fampidirana resina maina;

2. Tariby misy visy/voanjo;

3. Famolavolana manokana ny capacitance, voltage, endrika sns;

4. Fanoherana ny tontolo iainana miasa tafahoatra;

5. Fahaizana manasitrana tena;

6. Voasokajy ao amin'ny UL ary nosedraina 100% fa may.

Fampiharana

1. Mpanova herinaratra avy amin'ny masoandro;
2. mpanitsy angovo avy amin'ny rivotra;
3. Famandrihana;
5. AFP, SVG, ESS;
6. Fitaovana ara-pitsaboana.

 

IMG_2799

Androm-piainana

1

Sary misongadina

 

ΦD(mm)

P(mm)

H1(mm)

S

F

M

76

32

20

M12×16

M6×10

M8×20

86

32

20

M12×16

M6×10

M8×20

96

45

20

M12×16

M6×10

M8×20

116

50

22

M12×16

M6×10

M8×20

136

50

30

M16×25

M6×10

M8×20

2

Zintin'aratra 450V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja (Kg)
380 76 75 50 10 3.8 11.4 45 2.2 4.5 32 0.5
500 76 100 40 8 4.0 12.0 65 1.5 3.2 32 0.6
750 76 130 50 5 3.8 11.3 65 1.6 3.0 32 0.75
500 86 75 50 8 4.0 12.0 55 1.8 3.7 32 0.8
1000 86 130 50 5 5.0 15.0 70 1.5 2.7 32 1.1
650 86 100 40 5 3.3 9.8 75 1.2 3.0 32 0.9
650 86 95 40 5 3.3 9.8 75 1.2 3.0 32 0.85
650 96 75 50 5 3.3 9.8 60 1.5 3.7 45 0.75
1250 96 130 50 4 5.0 15.0 80 1 3.1 45 1.2
1800 116 130 50 4 7.2 21.6 85 0.8 3.5 50 1.6
1450 86 190 60 4 5.8 17.4 90 0.9 2.7 32 1.55
2700 116 190 60 3 8.1 24.3 100 0.8 2.5 50 2.45

 

Zintin'aratra 600V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja (Kg)
250 76 75 40 15 3.8 11.3 40 3.1 4.0 32 0.5
320 76 100 40 10 3.2 9.6 40 2.2 5.7 32 0.6
470 76 130 45 12 5.6 16.9 60 1.8 3.1 32 0.75
330 86 75 40 15 5.0 14.9 45 2.4 4.1 32 0.8
600 86 120 45 12 7.2 21.6 60 1.3 4.3 32 1.05
650 86 130 50 12 7.8 23.4 70 1.2 3.4 32 1.1
650 86 95 50 15 9.8 29.3 65 1.2 3.9 32 0.85
1000 86 180 50 12 12.0 36.0 70 1.5 2.7 32 1.5
420 96 75 45 15 6.3 18.9 50 2 4.0 45 0.75
800 96 130 60 12 9.6 28.8 75 1.5 2.4 45 1.2
950 116 100 60 10 9.5 28.5 90 1.2 2.1 50 1.25
1200 116 130 70 8 9.6 28.8 80 1.2 2.6 50 1.6
1800 116 180 50 8 14.4 43.2 80 1.2 2.6 50 2.4
2700 116 260 70 5 13.5 40.5 100 0.9 2.2 50 3.2
2500 136 180 60 5 12.5 37.5 100 0.8 2.5 50 3.7
3750 136 260 70 4 15.0 45.0 115 0.7 2.2 50 4.7

 

Zintin'aratra 700V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
200 76 75 40 15 3.0 9.0 40 4 3.1 32 0.5
400 76 130 45 15 6.0 18.0 60 2 2.8 32 0.75
420 76 130 50 15 6.3 18.9 60 2 2.8 32 0.75
600 86 125 60 15 9.0 27.0 45 3.2 3.1 32 1.05
550 86 130 50 12 6.6 19.8 65 1.8 2.6 32 1.1
680 96 130 45 12 8.2 24.5 75 1.5 2.4 45 1.2
720 96 125 60 12 8.6 25.9 55 2.6 2.5 45 1.15
1000 116 130 50 10 10.0 30.0 80 1 3.1 50 1.6
1000 96 180 60 10 10.0 30.0 75 1.2 3.0 45 1.6
1500 116 180 60 7 10.5 31.5 85 0.9 3.1 50 2.4
2000 116 230 70 7 14.0 42.0 85 0.8 3.5 50 3
2000 136 180 60 7 14.0 42.0 90 0.75 3.3 50 3.7
3000 136 230 70 5 15.0 45.0 100 0.7 2.9 50 4.2
3300 136 260 70 5 16.5 49.5 120 0.6 2.3 50 4.7

 

Zintin'aratra 800V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja (Kg)
110 86 80 45 20 2.2 6.6 75 2 1.8 32 0.8
150 86 95 45 20 3.0 9.0 80 1.5 2.1 32 0.85
250 86 75 45 15 3.8 11.3 45 3.1 3.2 32 0.8
360 86 130 55 12 4.3 13.0 65 2.2 2.2 32 1.1
470 86 130 45 12 5.6 16.9 70 2.8 1.5 32 1.1
600 96 130 55 10 6.0 18.0 75 2.2 1.6 45 1.2
730 86 180 55 10 7.3 21.9 70 1.8 2.3 32 1.5
750 86 180 55 12 9.0 27.0 75 1.8 2.0 32 1.5
1000 96 180 60 10 10.0 30.0 75 1.3 2.7 45 1.6
900 116 130 65 7 6.3 18.9 80 1.4 2.2 50 1.6
1400 116 180 65 7 9.8 29.4 80 0.9 3.5 50 2.4
1000 116 125 60 7 7.0 21.0 70 1.4 2.9 50 1.55
2000 116 230 65 5 10.0 30.0 85 0.9 3.1 50 3
2800 136 230 70 5 14.0 42.0 100 0.8 2.5 50 4.2

 

Zintin'aratra 900V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja (Kg)
160 76 75 40 15 3.0 9.0 35 3 5.4 32 0.5
320 76 130 50 15 5.0 14.9 60 3.2 1.7 32 0.75
350 76 125 50 15 5.0 15.0 40 2.8 4.5 32 0.75
210 86 75 40 15 3.2 9.5 40 2.2 5.7 32 0.8
450 86 125 45 12 5.4 16.2 50 2.7 3.0 32 1.1
420 86 130 45 12 5.0 15.1 65 2.5 1.9 32 1.1
490 86 120 45 10 4.9 14.7 70 1.8 2.3 32 1.05
510 86 120 45 10 5.1 15.3 70 1.8 2.3 32 1.05
660 86 180 50 10 6.6 19.8 70 2 2.0 32 1.5
900 86 230 50 10 9.0 27.0 65 2.1 2.3 32 1.8
580 96 125 50 10 5.8 17.4 55 3.3 2.0 45 1.2
540 96 130 50 7 3.8 11.3 75 1.5 2.4 45 1.2
630 116 100 55 7 4.4 13.2 60 2 2.8 50 1.3
860 116 125 55 7 6.0 18.1 60 2.2 2.5 50 1.55
810 116 130 60 7 5.7 17.0 80 1.2 2.6 50 1.6
1250 116 180 60 7 8.8 26.3 80 1.2 2.6 50 2.4
1700 116 230 60 5 8.5 25.5 80 1.1 2.8 50 3
1700 136 180 65 6 10.2 30.6 100 0.9 2.2 50 3.7
2400 136 230 70 5 12.0 36.0 100 0.95 2.1 50 4.2

 

Zintin'aratra 1100V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
130 76 75 40 15 1.9 5.6 35 4.5 3.6 32 0.5
260 76 130 45 15 3.8 11.3 60 2.8 2.0 32 0.75
280 76 125 50 12 3.3 9.9 35 4 4.1 32 0.75
170 86 75 50 15 2.6 7.7 45 5 2.0 32 0.8
360 86 125 55 12 4.3 13.0 35 2.5 6.5 32 1.1
330 86 130 45 15 5.0 15.0 65 2.8 1.7 32 1.1
420 86 136 45 12 5.0 15.0 60 2 2.8 32 1.15
420 86 155 45 12 5.0 15.0 65 1.5 3.2 32 1.25
470 86 180 60 10 4.7 14.1 70 1.8 2.3 32 1.5
500 86 180 60 10 5.0 15.0 70 1.8 2.3 32 1.5
600 86 225 60 10 6.0 18.0 80 1.2 2.6 32 1.8
600 86 225 70 10 6.0 18.0 60 2.2 2.5 32 1.8
600 116 130 50 10 6.0 18.0 75 1.8 2.0 50 1.6
680 86 225 70 12 8.2 24.5 65 2.5 1.9 32 1.8
720 86 230 70 12 8.6 25.9 65 2.5 1.9 32 1.8
460 96 125 65 10 4.6 13.8 55 3.2 2.1 45 1.2
520 96 180 65 12 6.2 18.7 75 1.5 2.4 45 1.6
500 116 100 70 10 5.0 15.0 55 2.5 2.6 50 1.3
680 116 125 70 10 6.8 20.4 60 2.8 2.0 50 1.6
650 116 130 75 10 6.5 19.5 75 1.3 2.7 50 1.6
1000 116 180 75 12 12.0 36.0 75 1.5 2.4 50 2.4
1200 116 230 80 8 9.6 28.8 80 1.5 2.1 50 3
1200 116 230 75 12 14.4 43.2 105 0.9 2.0 50 3
1250 116 230 75 12 15.0 45.0 80 1.5 2.1 50 3
1300 116 230 75 12 15.6 46.8 80 1.5 2.1 50 3
1400 136 180 70 7 9.8 29.4 85 1.3 2.1 50 3.7
1700 136 230 70 5 8.5 25.5 100 1.4 1.4 50 4.2
1900 136 230 75 5 9.5 28.5 100 1.2 1.7 50 4.2
2800 136 335 80 5 14.0 42.0 120 0.8 1.7 50 6.1
3060 136 345 80 5 15.3 45.9 120 0.9 1.5 50 6.2
3200 136 335 80 5 16.0 48.0 120 0.85 1.6 50 6.1

 

Zintin'aratra 1200V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja (Kg)
170 86 75 50 15 2.6 7.7 45 4.5 2.2 32 0.8
420 76 145 50 15 6.3 18.9 30 12 1.9 32 0.85
330 86 130 45 15 5.0 15.0 65 2.8 1.7 32 1.1
420 86 136 45 12 5.0 15.0 65 2 2.4 32 1.15
420 86 155 45 12 5.0 15.0 70 1.5 2.7 32 1.25
420 116 95 55 10 4.2 12.6 80 1.4 2.2 50 1.2
450 86 160 55 12 5.4 16.2 70 2.9 1.4 32 1.3
470 86 180 60 12 5.6 16.9 70 2.8 1.5 32 1.5
470 86 225 60 12 5.6 16.9 70 2.8 1.5 32 1.8
550 86 145 55 12 6.6 19.8 40 11 1.1 32 1,2
600 86 225 60 10 6.0 18.0 80 1.2 2.6 32 1.8
600 86 225 70 10 6.0 18.0 60 2.2 2.5 32 1.8
600 116 130 50 10 6.0 18.0 75 1.8 2.0 50 1.6
680 86 225 70 12 8.2 24.5 65 2.5 1.9 32 1.8
500 116 100 65 10 5.0 15.0 55 2.6 2.5 50 1.2
680 116 125 65 10 6.8 20.4 50 2.8 2.9 50 1.55
650 116 130 65 10 6.5 19.5 80 1.8 1.7 50 1.6
1000 116 180 70 7 7.0 21.0 75 1.3 2.7 50 2.4
1200 116 230 70 7 8.4 25.2 75 1.3 2.7 50 3
1250 116 230 70 7 8.8 26.3 75 1.2 3.0 50 3
1400 136 180 75 7 9.8 29.4 85 1.1 2.5 50 3.7
1700 136 230 80 5 8.5 25.5 85 1 2.8 50 4.2
850 136 125 70 8 6.8 20.4 75 1.6 2.2 50 1.9
950 136 125 60 8 7.6 22.8 80 1.1 2.8 50 2.4
1200 116 180 80 8 9.6 28.8 80 1 3.1 50 2.4
1200 116 180 60 5 6.0 18.0 100 0.8 2.5 50 2.4
1500 136 180 70 5 7.5 22.5 100 0.9 2.2 50 3.7
2700 136 335 80 5 13.5 40.5 110 0.85 1.9 50 6.1

 

Zintin'aratra 1300V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
230 86 125 50 15 5.7 17.1 35 5 3.3 32 1.1
210 86 130 50 15 3.2 9.5 70 2 2.0 32 1.1
330 86 180 60 15 5.0 14.9 65 3 1.6 32 1.5
470 86 230 65 12 5.6 16.9 65 3.2 1.5 32 1.8
410 116 130 65 12 4.9 14.8 80 1.8 1.7 50 1.6
650 116 180 65 10 6.5 19.5 85 2 1.4 50 2.4
880 116 230 80 10 8.8 26.4 85 2.2 1.3 50 3
900 136 180 70 7 6.3 18.9 100 1.6 1.3 50 3.7
1200 136 230 80 7 8.4 25.2 105 1.5 1.2 50 4.2

 

Zintin'aratra 1500V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
160 86 125 50 15 5.7 17.1 35 5 3.3 32 1.1
160 86 130 50 15 2.4 7.2 60 3.5 1.6 32 1.1
240 86 180 55 15 3.6 10.8 65 5 0.9 32 1.5
320 86 230 55 12 3.8 11.5 60 3.5 1.6 32 1.8
300 116 130 55 12 3.6 10.8 75 2 1.8 50 1.6
470 116 180 60 10 4.7 14.1 75 2.8 1.3 50 2.4
650 116 230 60 10 6.5 19.5 80 2.8 1.1 50 3
660 136 180 60 7 4.6 13.9 100 1.8 1.1 50 3.7
900 136 230 60 6 5.4 16.2 105 1.2 1.5 50 4.2
1000 136 260 70 5 5.0 15.0 120 0.9 1.5 50 4.7

 

Zintin'aratra 1800V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
130 86 125 55 15 5.7 17.1 35 5 3.3 32 1.1
120 86 130 55 15 1.8 5.4 60 2.5 2.2 32 1.1
180 86 180 60 15 2.7 8.1 65 2 2.4 32 1.5
260 86 230 60 12 3.1 9.4 60 3 1.9 32 1.8
230 116 130 60 12 2.8 8.3 80 2 1.6 50 1.6
360 116 180 65 10 3.6 10.8 80 3.2 1.0 50 2.4
500 116 230 70 10 5.0 15.0 75 3 1.2 50 3
510 136 180 70 7 3.6 10.7 100 2 1.0 50 3.7
680 136 230 70 7 4.8 14.3 95 2 1.1 50 4.2

 

Zintin'aratra 2000V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
100 86 125 55 15 1.5 4.5 35 3.8 4.3 32 1.1
90 86 130 55 15 1.4 4.1 65 2.5 1.9 32 1.1
150 86 180 60 15 2.3 6.8 60 3.5 1.6 32 1.5
200 86 230 60 12 2.4 7.2 65 2 2.4 32 1.8
180 116 130 65 10 1.8 5.4 75 2.5 1.4 50 1.6
280 116 180 70 10 2.8 8.4 70 2 2.0 50 2.4
380 116 230 80 10 3.8 11.4 80 2 1.6 50 3
400 136 180 60 7 2.8 8.4 100 1.6 1.3 50 3.7
550 136 230 70 7 3.9 11.6 100 1.5 1.3 50 4.2
850 136 335 80 5 4.3 12.8 120 1.1 1.3 50 6.1

 

Zintin'aratra 2800V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
160 116 180 70 30 4.8 14.4 75 2.2 1.6 50 2.4
210 116 230 75 25 5.3 15.8 70 2.8 1.5 50 3
225 136 180 75 20 4.5 13.5 85 2 1.4 50 3.7
300 136 230 80 15 4.5 13.5 80 2.5 1.3 50 4.2

 

Zintin'aratra 4000V.DC
Cn(uF) φD H ESL(nH) dv/dt(V/μS) Ip(KA) Dia(KA) Irms(A)50℃ ESR (mΩ) @1KHz Rth(K/W) P(mm) lanja
70 116 180 70 50 3.5 10.5 70 3.5 1.2 50 2.4
95 116 230 75 40 3.8 11.4 70 3.6 1.1 50 3
100 136 180 75 35 3.5 10.5 85 3 0.9 50 3.7
135 136 230 80 30 4.1 12.2 80 3.5 0.9 50 4.2

Sary momba ny antsipirian'ny vokatra:

Orinasa OEM ho an'ny Capacitor Can Aluminium - Capacitor Sarimihetsika UL Certified ho an'ny Sivana DC (DMJ-MC) - sary antsipiriany CRE

Orinasa OEM ho an'ny Capacitor Can Aluminium - Capacitor Sarimihetsika UL Certified ho an'ny Sivana DC (DMJ-MC) - sary antsipiriany CRE

Orinasa OEM ho an'ny Capacitor Can Aluminium - Capacitor Sarimihetsika UL Certified ho an'ny Sivana DC (DMJ-MC) - sary antsipiriany CRE

Orinasa OEM ho an'ny Capacitor Can Aluminium - Capacitor Sarimihetsika UL Certified ho an'ny Sivana DC (DMJ-MC) - sary antsipiriany CRE


Torolàlana momba ny vokatra mifandraika amin'izany:

Miaraka amin'ny filozofian'ny orinasa "Mifantoka amin'ny mpanjifa", teknika fanaraha-maso kalitao tsara, fitaovana famokarana mandroso ary mpiasa R&D matanjaka, dia manolotra vokatra avo lenta, vahaolana tsara ary vidiny mirary ho an'ny OEM Factory for Aluminum Can Capacitor - UL Certified Film Capacitor for DC Filtering (DMJ-MC) – CRE izahay, izay hamatsiana manerana izao tontolo izao, toy ny: Brisbane, Etazonia, Alemaina. Manankarena traikefa sy voaofana tsara ny mpiasanay, manana fahalalana matihanina, angovo ary manaja ny mpanjifany ho laharana voalohany, ary mampanantena ny hanao izay fara heriny mba hanomezana serivisy mahomby sy manokana ho an'ny mpanjifa. Mifantoka amin'ny fitazonana sy fampivoarana ny fifandraisana fiaraha-miasa maharitra amin'ny mpanjifa ny orinasa. Mampanantena izahay, amin'ny maha-mpiara-miasa tonga lafatra anao, fa hamorona hoavy mamirapiratra ary hankafy ny vokatra mahafa-po miaraka aminao, miaraka amin'ny zotom-po maharitra, angovo tsy misy fiafarana ary toe-tsaina mandroso.
  • Orinasa malaza ity, manana fitantanana orinasa avo lenta izy ireo, vokatra sy serivisy tsara kalitao, azo antoka sy faly izahay miara-miasa! Kintana 5 Nosoratan'i Alex avy any Kenya - 2017.03.28 16:34
    Mifanaraka amin'ny filàn'ny tsena ity orinasa ity ary mandray anjara amin'ny fifaninanana eny an-tsena amin'ny alàlan'ny vokatra avo lenta, orinasa manana toe-tsaina sinoa ity. Kintana 5 Nosoratan'i Mildred avy any Riyadh - 2018.06.18 19:26

    Alefaso aminay ny hafatrao:

    Soraty eto ny hafatrao ary alefaso aminay

    Alefaso aminay ny hafatrao: