Unique Instruments Corporation
No. 41, B. B. Ganguly Street, Near Central Metro Station
Kolkata- 700012, West Bengal (India)
H2O Remediation Engineering
No. 130/7, Dum Dum Road, 1st Floor, Dum Dum
Kolkata- 700074, West Bengal (India)
Surya Instruments
28, Tara Chand Dutta Street, Ground Floor
Kolkata- 700073, West Bengal (India)