GB/T 19934.1-2021.Hydraulic fluid power-Fatigue pressure testing of metal pressure-containing envelopes-Part 1: Test method. 1范围 GB/T 19934的本部分规定了在连续稳

GB/T 7308.1-2021.Plain bearings-Thin-walled half bearings with or without flange-Part 1:Tolerances , design features and methods of test. 1范围 GB/T 730

GB/T 39743-2021.Plain bearings-Thermoplastic bushes-Dimensions and tolerances. 1范围 GB/T 39743规定了依据ISO 12128生产的带有或不带润滑油槽的压人式热塑性塑料轴套的尺寸与公差。依据表2和表3生产的热塑性

GB/T 3480.2-2021.Calculation of load capacity of spur and helical gears-Part 2: Calculation of surface durability (pitting). 1范围 GB/T 3480的本部分规定了外啮合与内

GB/T 39959-2021.Liquid pumps and pump units一Noise test code-Grades 2 and 3 of accuracy. 1范围 GB/T 39959规定了液体泵或泵机组(见4.1)噪声试验有效实施的相关信息和标准条件下其发射的空气噪声的测定、标

GB/T 39789-2021.Non-destructive testing of welds- Eddy current-video integrated testing method of metal composites weld. 1范围 GB/T 39789规定了采用涡流视频集成技术检测

GB/T 39789-2021.Non-destructive testing of welds- Eddy current-video integrated testing method of metal composites weld. 1范围 GB/T 39789规定了采用涡流视频集成技术检测

GB/T 39757-2021.Building construction machinery and equipment-Code of practice for the safe use of concrete pumps and mobile concrete pumps with placi

GB/T 39747-2021.Code of practice for the safe use of supported elevating work platform. 1范围 GB/T 39747规定了举升式升降工作平台(以下简称举升平台)的运输、移交、布置、操作、检查和维护的要求，为举升平

GB/T 39802-2021.Technical requirements for thermal insulation material of urban heat-supplying. 1范围 GB/T 39802规定了城镇供热中用于介质温度不大于350 °C的蒸汽和介质温度不大于150 °C