K Optimax Corporation
AE 386, Salt Lake
Kolkata- 700064, West Bengal (India)
Iris Engineering Co.
A 188/A, H. B. Town, Road No. 4, Sodepur
Kolkata- 700110, West Bengal (India)
Thyssenkrupp Elevator India Private Limited
No. 39A, Harish Mukherjee Road, 3rd Floor, Mallick Court
Kolkata- 700025, West Bengal (India)