GB/T 2493-2023 Chinese PDF (GB/T2493-2023) GB/T 42151.4-2024 and laboratory use - Part

and laboratory use - Part 17: Particular requirements for equipment intended to be used in educational establishments by children (Chinese: 测量、控制和实验室用电气设备的安全要求 第17部分：教育机构中儿童使用设备的特殊要求)

English versions: GB/T 44999-2024

English versions: GB/T 9089

English versions: GB/T 2881-2023

2-2024_Chinese: Geometrical product specifications(GPS) - Roundness - Part 2: Specification operators (Chinese: 产品几何技术规范（GPS） 圆度 第2部分：规范操作集)

GB/T 2493-2023 Chinese PDF (GB/T2493-2023) GB/T 42151.4-2024 and laboratory use - PartGB T 2493 2023_Chinese: Test method for rotating strength of abrasive products (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 2493 2023