Home / Standards / GB/T 46075.4-2025 GB/T 46075.4-2025 Active Acceptance inspection of electron beam welding machines—Part 4: Measurement of welding speed 电子束焊机验收检验 第4部分:焊接速度的测量 Standard Type GBT ICS 25.160.30 CCS J33 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 国家标准委 Drafting Unit N/A