Bien Artium Natural Science Pvt. Ltd.
6, Mangoe Lane
Kolkata- 700001, West Bengal (India)
Sarkar Gas Servicing Center
Samar Ali Pally, Fatulla Pur Nimta
Kolkata- 700049, West Bengal (India)
Hardware Plus
167/7, Lenin Sarani, Chandni, 3rd Gate
Kolkata- 700072, West Bengal (India)
Biswakarma Enterprise
Doctor B. C. Roy Road, Nowapara, Shyamnagar
Kolkata- 743127, West Bengal (India)
Soraj Instruments & Control Enterprise
College Road, Barjora, Bankura
Howrah- 722202, West Bengal (India)
Chemicals & Instruments Corporation
No. 55, Ezra Street, 3rd Floor
Kolkata- 700001, West Bengal (India)
S. B. Scientific Works
No. 12/1/1A, Rani Sankari Lane
Kolkata- 700026, West Bengal (India)