My take:
1. The last specimen, FRAME 3, has geometry and reinforcement similar to FRAME 1 but its boundary conditions are very (is very necessary) different.
2. The geometry and reinforcement of thel ast specimen, FRAME 3, is similar to FRAME 1 but its boundary conditions are very (is very necessary) different.
1. The last specimen, FRAME 3, has geometry and reinforcement similar to FRAME 1 but its boundary conditions are very (is very necessary) different.
2. The geometry and reinforcement of thel ast specimen, FRAME 3, is similar to FRAME 1 but its boundary conditions are very (is very necessary) different.
Yours truly, gulilero