Nanda Manufacturing Co.
1/2, Chanditala Branch Road, Near Behala Chandi Mandir
Kolkata- 700053, West Bengal (India)
Unique Instruments Corporation
No. 41, B. B. Ganguly Street, Near Central Metro Station
Kolkata- 700012, West Bengal (India)
Pradip & Co.
No. 155, Lenin Sarani Nigam Center, 4th Floor, Room No. 414 C
Kolkata- 700013, West Bengal (India)
Canan Testing Services
No. 7, Prince Golam MD. Road
Kolkata- 700026, West Bengal (India)