LOCKED CELLS #1

The puzzle below shows, that by using simple logic, in grid #2 (upper center), there are two locked cells with the values of 3-7.
"once you have double locked cells within a grid pattern, you may deduce that those two cells are taken by the either of the two numbers and you may proceed to solve the other cells in the grid.
This process will take you to the next posting.
(scroll up to the next post please)