The inventory classification of each unit is based on its own actual situation. For example, raw materials can be divided into direct products (main materials) and indirect products (auxiliary materials), and auxiliary materials can be divided into 1 and hardware (screws, nuts, etc.). 2. Tools (pliers, wrenches, etc.). 3. Electrical appliances (wires, light bulbs, etc.). ) and labor insurance (work clothes, shoes, hats, etc. )