GB/T 34877.4-2024 Chinese PDF (GB/T34877.4-2024) GB/T 45447-2025 4-2025_Chinese: Safety of laser products

4-2025_Chinese: Safety of laser products - Part 4: Laser guards (Chinese: 激光产品的安全 第4部分：激光防护屏)

GB/T 19042

GB/T 45486-2025_Chinese: Ships and marine technology - Ballast water management systems (BWMS) - Computational physical modelling and calculations on scaling of UV reactors (Chinese: 船舶与海上技术 压载水管理系统（BWMS） 紫外反应器的比例缩放数值模拟与计算)

GB/T 19514-2024_Chinese: Method of measuring volume for passenger car luggage compartment (Chinese: 乘用车行李舱容积的测量方法)

English versions: GB 44496-2024

GB/T 34877.4-2024 Chinese PDF (GB/T34877.4-2024) GB/T 45447-2025 4-2025_Chinese: Safety of laser productsGB T 34877. 4 2024_Chinese: Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 4: Sound intensity method (Chinese: 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 34877. 4 2024