GB/T 18688-2023 Chinese PDF (GB/T18688-2023) GB/T 26882.4-2024 socket-outlets and couplers for industrial

socket-outlets and couplers for industrial purposes - Part 6: Direct current(DC) plugs

English versions: GB/T 45585-2025

GB/T 44883-2024_Chinese: Energy efficiency control system in process production - Design requirements (Chinese: 流程生产能效管控系统 设计要求)

GB/T 2881-2023_Chinese: Silicon metal (Chinese: 工业硅)

English versions: GB/T 17643-2025

GB/T 18688-2023 Chinese PDF (GB/T18688-2023) GB/T 26882.4-2024 socket-outlets and couplers for industrialGB T 18688 2023_Chinese: Agricultural irrigation equipment Pressure losses in irrigation valves Test method (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 18688 2023