Compare Diamond Harbour Government Polytechnic Diploma in Mechanical Engineering and The Calcutta Technical School Diploma in Civil Engineering course on the basis of their Fees, Placements, Cut Off, Reviews, Seats, Courses and other details. Diamond Harbour Government Polytechnic Diploma in Mechanical Engineering course is rated 4.2 out of 5 by 2 genuine verified students while The Calcutta Technical School same course is rated 3.4 out of 5 by 1 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.