How to collect data from many cells in a row into one cell?

How to collect data from many cells in a row into one cell?

I provided and example, how I want it be:

	A	B	C	D	E	F	G	H	I	J	K	...
1	Diameter	List of elements										...
2	∅6	9 1 3 5	9		1				3		5	...
3	∅8	5 4 7 9	5	4				7			9	...
...	...	...	...	...	...	...	...	...	...	...	...	...

I have very long rows with many columns starting from column C, some cells are empty. In cell B2 I want to collect all data from cells of the row with single space between them. The same I want to do in cell B3 and downwards ...

I know in Excell 2010, the cell can contain 32767 characters maximum.
Maybe it's better to export that list of elements to text file or use aditional reserved cells C2; D2; E2 - if the text doesn't fit to B2.

Appreciate any help