GB 45549-2025 Chinese PDF GB/T 21044-2024 4-2025_Chinese: Instruments for stage measurement

4-2025_Chinese: Instruments for stage measurement - Part 4: Ultrasonic stage recorder (Chinese: 水位测量仪器 第4部分：超声波水位计)

2-2025_Chinese: Test methods of rare earth phosphors for LED - Part 2: Determination of relative brightness (Chinese: LED用稀土荧光粉试验方法 第2部分：相对亮度的测定)

2-2024_Chinese: Mechanical structures for electrical and electronic equipment - Outdoor enclosures - Part 2: Coordination dimensions (Chinese: 电气和电子设备机械结构 户外机壳 第2部分：协调尺寸)

2-2024_Chinese: Devices and integration in enterprise systems - Function blocks(FB) for process control and electronic device description language(EDDL) - Part 2: Specification of FB concept (Chinese: 企业系统中的设备和集成 过程控制用功能块（FB）和电子设备描述语言（EDDL） 第2部分：FB概念规范)

GB/T 17263-2025_Chinese: Self-ballasted lamps for general lighting service - Performance specifications (Chinese: 普通照明用自镇流荧光灯 性能规范)

GB 45549-2025 Chinese PDF GB/T 21044-2024 4-2025_Chinese: Instruments for stage measurementGB 45549 2025_Chinese: Norm of energy consumption per unit production of graphite and fluorite (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 45549 2025