The first basic knowledge
Chapter I Common Letters and Symbols
Chapter II Common Units of Measurement
Chapter III Commonly Used Formulas and Values
The second piece of metal material
Chapter I Ferrous Metal Materials
Chapter II Varieties and Specifications of Steel Products
Chapter III Nonferrous Metal Materials
Chapter IV Metals, Alloys, Metal Composite Materials and Corrosion Resistant Alloys with Special Properties and Uses
Part III Non-metallic Materials
Chapter I Rubber and Rubber Products
Chapter II Plastics and Plastic Products
Chapter III Asbestos Products
Chapter IV Mica Products
Chapter V Non-metallic Materials for Building and Decoration
Chapter VI Building Glass
Chapter VII Building decorative coatings and Painting
Chapter VIII Building Decoration Adhesives and Other Materials
Part IV General Components and Devices
Chapter I Fasteners
Chapter II Transmission Parts
Chapter III Pipeline Accessories, Pipes, Fittings and Valves
The fourth chapter commonly used machine tool accessories and lubricators
Chapter V Common Fire Equipment
Chapter VI Electrical Equipment
Chapter VII Building Hardware
Chapter VIII Radiator and Air Conditioning
Chapter IX Bathroom and Kitchen Equipment
Article 5 Common hardware tools
Chapter I Common Hand Tools
Chapter II Fitter Tools
Chapter III Water Heating Tools
Chapter IV Electric Tools
Chapter V Metal Cutting Tools
Chapter VI Measuring Tools
Chapter VII Electric Tools
Chapter VIII Pneumatic Tools
Chapter 9 Lifting, Hydraulic Devices and Tools
Chapter 10 Welding Equipment and Tools
Chapter II XI Spraying Equipment and Tools
Chapter XII Civil Tools
Chapter XIII Gardening Tools