Compare Bengal College of Polytechnic Diploma in Mechanical Engineering and Techno Main Salt Lake Diploma in Mechanical Engineering course on the basis of their Fees, Placements, Cut Off, Reviews, Seats, Courses and other details. Bengal College of Polytechnic Diploma in Mechanical Engineering course is rated 4.7 out of 5 by 9 genuine verified students while Techno Main Salt Lake same course is rated 4.0 out of 5 by 3 students at Shiksha. Explore Shiksha for detailed comparison on all course parameters and Download free information on After 10th Diploma Admission details, Placement report, Eligibility criteria etc.