GB/T 21231-2007
声学 小型通风装置辐射空气噪声的测量方法
Acoustics - Method for the measurement of airborne noise emitted by small air-moving devices
- 实施日期
- 2008-05-01
- ICS 分类
- 17.140.20;23.120
组合使用关键词、标准类型、状态与 ICS 分类,快速定位所需国家标准。
找到 1,579 条
GB/T 21231-2007
Acoustics - Method for the measurement of airborne noise emitted by small air-moving devices
GB/T 21229-2007
Acoustics - Determination of sound power levels of noise from air-terminal devices,air-terminal units,dampers and valves by measurement in a reverberation room
GB/T 17248.6-2007
Acoustics - Noise emitted by machinery and equipment - Engineering method for the determination of emission sound pressure levels in situ at the work station and at other specified positions using sound intensity
GB/T 21232-2007
Acoustics - Guidelines for noise control in offices and workrooms by means of acoustical screens
GB/T 21230-2007
Acoustics - Guidelines for the measurement and assessment of exposure to noise in a working environment
GB/T 19882.31-2007
Automatic meter reading system - Part 3-1: Application layer data exchange protocols - Object identification system
GB/T 17215.301-2007
Particular requirements for multi - function electricity meters
GB/T 21117-2007
Magnetostrictive liquid level meter
GB/T 19882.32-2007
Automatic meter reading system - Part 3-2: Application layer data exchange protocols - Interface Clasess
GB/T 19882.33-2007
Automatic meter reading system - Part 3-3: Application layer data exchange protocol - COSEM Application layer
GB/T 21005-2007
UV erythema reference action spectrum,standard erythema dose and UV index
GB/T 20485.21-2007
Methods for the calibration of vibration and shock transducers - Part 21: Vibration calibration by comparison to a reference transducer
GB/T 20485.13-2007
Methods for the calibration of vibration and shock transducers - Part 13: Primary shock calibration by laser interferometry
GB/T 8123-2007
Dial test indicators
GB/T 20920-2007
Electronic level meter
GB/T 20919-2007
External micrometer with electronic digital display
GB/T 18761-2007
Dial indicator with electronic digital display
GB/T 20921-2007
Condition monitoring and diagnostics of machines - Vocabulary
GB/T 11348.2-2007
Mechanical vibration - Evaluation of machines vibration by measurements on rotating shafts - Part 2:Land-based steam turbines and generators in excess of 50MW with normal operating speeds of 1500r/min, 1800r/min, 3000r/min and 3600r/min
GB/T 6075.2-2007
Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Part 2: Land-based steam turbines and generators in excess of 50MW with normal operating speeds of1500r/min,1800r/min,3000r/min and 3600r/min