Home / Standards / GB/T 42351.2-2024 GB/T 42351.2-2024 Active Preparation of particulate reference materials—Part 2: Polydisperse spherical particles 颗粒标准样品的制备 第2部分:多分散球形颗粒 Standard Type GBT ICS 19.120 CCS A28 Status 现行 Issue Date 2024-09-29 Implementation 2025-04-01 Responsible Dept 国家标准委 Drafting Unit N/A