For Both Technical data and Download content placing

Follow those given steps

1. Go to admin

2. Go to posts

3. Add New

4. give title , description , images etc, then select category which is present in right side.

5. then publish.

After that all the download articles comes in download page,

And
1. Product Catalogs
2. Product Brochures
3. Company Introduction

Those three are the subcategory of download …so all latest articles comes in download pageand for all subcategory ,it will show its specific articles.

And same for Technical data

that all the technical data articles comes in knowledge center page,

1. Bearing Selection
2. Bearing Installation
3. Bearing Maintenance
4. Bearing Engineering

Those four are the subcategory of technical data …so all latest articles comes in Knowledge center page and for all subcategory ,it will show its specific articles.