特色：
This book discusses systematically the theoretic approach to extension engineering methods and their applications.Its major content includes：Chapter One：the fundamental idesa，theories and approaches.Chapter Two：the extensibility and extension method of matter-element.Chapter Three：evaluation methods and lozenge （rhombus）mode thinking.Chapter Four：transformation methods of matter-elements.Chapter Five：extension engineering methods.This book is designed for college teachers and students，engineers，technicians as well as management personnel concerned.