![]() Instrument for geotechnical engineering - General specifications of vibrating wire sensor 土工试验仪器 岩土工程仪器 振弦式传感器通用技术条件 |
![]() Corrosion of metal and alloys - Stress corrosion testing - Part 9: Preparation and use of pre-cracked specimens for tests under rising load or rising displacement 金属和合金的腐蚀 应力腐蚀试验 第9部分:渐增式载荷或渐增式位移下的预裂纹试样的制备和应用 |
![]() Eiectromagnetic compatibility limits(EMC) - Limitation of voltage changes,voltage fluctuations and flicker in public low-voltage supply systems,for equipment with rated current ≤16A per phase and not subject to conditional connection 电磁兼容 限值 对每相额定电流≤16A且无条件接入的设备在公用低压供电系统中产生的电压变化、电压波动和闪烁的限制 |
![]() Safety of power transformers,power supply units and similar devices - Part 9: Particular requirements for bell and chime transformers 电力变压器、电源装置和类似产品的安全 第9部分:电铃和电钟变压器的特殊要求 |
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