NF B53-614-1997 圆木和锯材.生物降解测量方法
时间:2024-05-16 21:44:36 来源: 标准资料网 作者：标准资料网 阅读：9919
【英文标准名称】:Roundandsawntimber.Methodofmeasurementofbiologicaldegrade.
【原文标准名称】:圆木和锯材.生物降解测量方法
【标准号】:NFB53-614-1997
【标准状态】:现行
【国别】:法国
【发布日期】:1997-06-01
【实施或试行日期】:1997-06-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:锯材;木材;病虫害;遭受虫害;种间侵害;斑渍;霉菌侵袭;原木;腐烂;机械性能;测量;外观;测定;分类
【英文主题词】:Appearance;Classification;Determination;Fungalattack;Insectinfestations;Logs;Measurement;Mechanicalproperties;Pestdamage;Pests;Rot;Sawntimber;Stains(discoloration);Wood
【摘要】:
【中国标准分类号】:B68;B69
【国际标准分类号】:79_040
【页数】:9P;A4
【正文语种】:其他
Product Code:SAE AMS5737
Title:Steel, Corrosion and Heat-Resistant, Bars, Wire, Forgings and Tubing, 15Cr - 25.5Ni - 1.2Mo - 2.1Ti - 0.006B - 0.30V, Consumable Electrode Melted, 1650 °F (899 °C), Solution and Precipitation Heat Treated
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and heat resistant steel in the form of bars, wire, forgings, mechanical tubing, and stock for forging or heading.Product Code:SAE AIR1905
Title:Gas Turbine Coaxial Exhaust Flow Noise Prediction
Issuing Committee:A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
Scope: SAE ARP 876C provides a method for predicting major elements of the exhaust noise of a jet. It is incomplete in that no recommended method for shock-free coaxial flows is included. As discussed in the Addendum (Appendix C) to ARP 876C, the lack of a recommended method reflects the difficulties incurred in attempting to correlate satisfactorily data that have become available since the mid 1970s. During that period, three proposed methods were reviewed by the Gas Turbine Propulsion Subcommittee of the SAE A-21 Aircraft Noise Committee, none of which received the necessary level of support to allow publication in ARP 876C. Accordingly this AIR is issued to make available to those wishing to predict turbofan exhaust noise the main candidate procedures thus far considered by the Subcommittee.