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GB/T 1927.4-2021
Test methods for physical and mechanical properties of small clear wood specimens—Part 4: Determination of moisture content
GB/T 1927.3-2021
无疵小试样木材物理力学性质试验方法 第3部分:生长轮宽度和晚材率测定
Test methods for physical and mechanical properties of small clear wood specimens—Part 3: Determination of the growth rings width and latewood rate of wood
GB/Z 41046-2021
Rehabilitation robot for upper limb training—Requirements and test methods
GB/T 41027-2021
Aluminum alloy MJ thread with small flange blind hole self locking insert for aviation
GB/T 41029-2021
Specification for offshore well abandonment operation of oil&gas drilling
GB/T 1927.1-2021
Test methods for physical and mechanical properties of small clear wood specimens—Part 1: Collection of sample tree
GB/T 1927.2-2021
无疵小试样木材物理力学性质试验方法 第2部分:取样方法和一般要求
Test methods for physical and mechanical properties of small clear wood specimens—Part 2: Sampling methods and general requirements
GB 40876-2021
Minimum allowable values of energy efficiency and energy efficiency grades for commercial induction cookers
GB 21454-2021
Minimum allowable values of the energy efficiency and energy efficiency grades for multi-connected air-condition (heat pump) units
GB/T 41135.1-2021
故障路径指示用电流和电压传感器或探测器 第1部分:通用原理和要求
Current and voltage sensors or detectors, to be used for fault passage indication purposes—Part 1: General principles and requirements