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本標(biāo)準(zhǔn)規(guī)定了工作座椅的術(shù)語、結(jié)構(gòu)型式、主要尺寸和一般人類工效學(xué)要求。 本標(biāo)準(zhǔn)適用于一般工作場(chǎng)所(含計(jì)算機(jī)房、打字室、控制室、交換臺(tái)等場(chǎng)所)坐姿操作人員使用的工作座椅。 本標(biāo)準(zhǔn)不適用于辦公室和家庭用椅,不適用于安裝在生產(chǎn)設(shè)備上的固定式工作座椅、駕駛員座椅和在狹小作業(yè)空間使用的工作座椅。
本規(guī)范適用于新建、擴(kuò)建和改建的各類廳堂相對(duì)固定安裝的擴(kuò)音系統(tǒng)設(shè)計(jì),不包括電影還音系統(tǒng)(即B環(huán))。 本規(guī)范制定了各類廳堂擴(kuò)聲系統(tǒng)設(shè)計(jì)的技術(shù)要求和觀眾廳的擴(kuò)聲系統(tǒng)特性指標(biāo)。
本標(biāo)準(zhǔn)規(guī)定了與食品接觸的高分子材料及其制品在100℃~175℃范圍內(nèi),向食品模擬物中總遷移量的測(cè)定方法。本標(biāo)準(zhǔn)適用于片或薄膜形式的與食品接觸的高分子材料及其制品,也可用于更廣泛的材料和容器類型。
本規(guī)范適用于新建、擴(kuò)建和改建的劇場(chǎng)建筑設(shè)計(jì)。
本規(guī)程適用于新建、擴(kuò)建、改建體育場(chǎng)館的聲學(xué)設(shè)計(jì)和聲學(xué)測(cè)量,也適用于既有體育場(chǎng)館的聲學(xué)測(cè)量。
本標(biāo)準(zhǔn)規(guī)定了鐵路機(jī)車車輛用材料阻燃技術(shù)要求及試驗(yàn)方法。本標(biāo)準(zhǔn)適用于高運(yùn)行速度不大于200 km/h的鐵路機(jī)車及客車。
本標(biāo)準(zhǔn)規(guī)定了動(dòng)車司機(jī)座椅的使用條件、技術(shù)要求、試驗(yàn)方法、檢驗(yàn)規(guī)則以及標(biāo)志、包裝、運(yùn)輸和貯存等。本標(biāo)準(zhǔn)適用于動(dòng)車司機(jī)座椅,其他機(jī)車車輛司機(jī)座椅可參照使用。
The ITU Radiocommunication Assembly considering that conventional objective methods (e.g. for measuring signal-to-noise ratio and distortion) are no longer adequate for measuring the perceived audio quality of systems which use low bit-rate coding schemes or which employ analogue or digital signal processing; that low bit-rate coding schemes are rapidly being deployed; that not all implementations conforming to a specification or standard guarantee the best quality achievable with that specification or standard; that formal subjective assessment methods are not suitable for continuous monitoring of audio quality, e.g. under operational conditions; that objective measurement of perceived audio quality may eventually complement or supersede conventional objective test methods in all areas of measurement; that objective measurement of perceived audio quality may usefully complement subjective assessment methods; that, for some applications, a method which can be implemented in real time is necessary.
This document specifies the terminology of acoustics. It contains general terms and definitions as well as terms and definitions from other realms of acoustic.
This International Standard provides methods for analysing data from a Weibull distribution using continuous parameters such as time to failure, cycles to failure, mechanical stress, etc. In this standard, numerical methods and graphical methods are described to plot data, to make a goodness-of-fit test, to estimate the parameters of the two- or three-parameter Weibull distribution and to plot confidence limits. Guidance is given on how to interpret the plot in terms of risk as a function of time, failure modes and possible weak population and time to first failure or minimum endurance.
This part of ISO 105 specifies a method intended for determining the effect on the colour of the textiles of all kinds and in all forms to the action of an artificial light source representative of natural daylight (D65). The method is also applicable to white (bleached or optically brightened) textiles. This method allows the use of two different sets of blue wool references. The results from the two different sets of references may not be identical.
This International Standard specifies requirements for characterization of airborne nanoparticles in inhalation exposure chambers for the purpose of inhalation toxicity studies in terms of particle mass, size distribution, number concentration and composition.
This document specifies a method based on cup tests for determining the water vapour permeance of building products and the water vapour permeability of building materials under isothermal conditions. Different sets of test conditions are specified. The general principles are applicable to all hygroscopic and non-hygroscopic building materials and products, including insulation materials and including those with facings and integral skins. Annexes give details of test methods suitable for different material types. The results obtained by this method are suitable for design purposes, production control and for inclusion in product specifications.