I. General classification of petroleum products 1. The general classification of petroleum products and lubricants in GB/T498-87 not only specifies the categories (represented by symbols) and their corresponding meanings (Table 1), but also the coding symbols for product names. Representation. At present, this new coding symbol has been widely used in lubricating oil products in China.
Independent Led Driver ,Led Built-In Power Supply,Independent Led Power Supply,Independent Constand Power Supply
Effort Semiconductor Lighting Ltd. , https://www.effortem.com