电工资料大全－－电工手册（1768页）

本手册的主要内容包括：电工常用符号和计量单位、电工识图、电工基础知识、电工常用仪表及工具、电工测量、电工材料、变压器、电动机、电气控制、高压配电、低压配电、电气照明、安全用电、电子技术基础知识等内容。

-Electrical Sourcebook- Electrical Manual (1768) The main content of this manual include: electrical symbols and common units of measurement, electrical knowledge map, basic knowledge of electrical, electrical instruments and tools commonly used, electrical measurement, electrical materials, transformers, motors, electrical control, high voltage distribution, low voltage power distribution, electrical lighting, security, electricity, basic knowledge of electronics and other content.