QJ A 300-1995 普通螺纹螺栓和螺钉的强度数据

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Product Code:SAE ARP1846
Title:Measurement of Far Field Noise From Gas Turbine Engines During Static Operation
Issuing Committee:A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
Scope: Recommendations presented in this document are intended primarily for the acquisition of far-field acoustical data. The test engine is to be appropriately configured and operated so that the acoustical signals generated are consistent with the specific objectives of the test. The principal output of the data reduction system is one-third octave band sound pressure levels. However, broader or narrower bandwidth analysis of the recorded data may also be accomplished when appropriate. Although not specifically intended to apply to special purpose engine noise testing (for example, tests involving unique instrumentation or procedures to identify specific noise sources), some of the practices described herein may be appropriate for such testing. Specification of reference conditions is outside the scope of this document although procedures to adjust data to a reference condition are described.

标准名称：	缝纫机零件电镀通用技术条件
中标分类：	轻工、文化与生活用品 >> 钟表、自行车、缝纫机 >> 缝纫机
替代情况：	QB 625-75
发布部门：	中华人民共和国轻工业部
发布日期：	1992-08-31
实施日期：	1993-04-01
首发日期：	1900-01-01
作废日期：	1900-01-01
提出单位：	轻工业部质量标准司
归口单位：	全国缝纫机标准化中心
起草单位：	广州华南缝纫机工业公司
起草人：	王广池、徐文娟、卢颜佩
出版社：	中国轻工业出版社
出版日期：	1993-04-01
页数：	6页

本标准规定了缝纫机零件进行电镀处理的铬、镍、锌表面镀层的标注、分类、选用依据、技术要求、试验方法。
本标准适用于作为防护性、装饰性的金属基体的缝纫机电镀零件(以下简称“镀件”），其他镀层、镀种和(或)工程性电镀的被件，亦应参照便用。

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