Your technical specification should have the table of contents similar to the following typical Engineering Specification:

1. GENERAL
1.1 PROJECT OVERVIEW
2. SCOPE
3. DEFINITION AND ABBREVIATIONS
4. CODES, STANDARDS AND REFERENCE DOCUMENTS
4.1 Design Codes & Standards to be used
4.2 Reference Documents
4.3 Compliance
5. SYSTEM & TECHNICAL REQUIREMENTS
6. SCOPE OF SUPPLY
6.1 Hardware Supply
6.2 Services Supply
7. TESTING AND INSPECTION
8. TRAINING
9. SPARE PARTS
10. VENDOR DOCUMENTATION
11. GUARANTEE
12. PACKING AND TRANSPORT

Try to complete each section.

(The hydraulic powered robot arm is made from wood; also it is driven by 2 or more hydraulic cylinders and other necessary components. It’s size is to be average/small.

An example (picture):

http://img16.imageshack.us/img16/3751/img2012111201003.jpg

Maximum pages: 2
Each section should have at least 2 sentences.