What’s the difference of ORM5, ORM6 and ORM7

There are no essential differences, just on request of different customer’s different demand:
1. ORM5 can render from 20cm to 4.5m, rendering width can be 800mm; 1000mmand 1200mm

2.ORM6 can render from 0cm to 4.5m, rendering width can be 1000mm;

3.ORM7 is updating type of ORM5, has same technical parameters of ORM5