Designation: E1050 − 12Standard Test Method forImpedance and Absorption of Acoustical Materials Using aTube, Two Microphones and a Digital Frequency AnalysisSystem1This standard is issued under the fixed designation E1050; the number immediately following the designation indicates the year oforiginal ...
ASTM 标准 1050 12 《【ASTM标准】E 1050 - 12》由会员分享,可在线阅读,更多相关《【ASTM标准】E 1050 - 12(12页珍藏版)》请在人人文库网上搜索。 12a is 1050; in of of A in of ) an or of an a of of is he I to be No of in to if It is of to to 002)0534:05342 he in is to...
ASTM E1050是美国材料和试验协会(ASTM International)发布的标准,全称为"Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones and a Digital Frequency Analysis System"(使用管道、两个麦克风和数字频率分析系统测量声学材料的阻抗和吸收性能的标准测试方法)。 该标...
深圳市实测通技术服务有限公司 提供的 美国标准ASTM E 1050 吸音效果测试,Testitem 测试名称:Absorptionand Impedance Measurements 吸音效果Sample size送样规格:20m2Lead time测试周期: 常规 Regular
ASTM E1050-19 星级: 14 页 ASTM C365标准电子版 星级: 3 页 ASTM d5229标准电子版 星级: 13 页 ASTM C365标准电子版 星级: 2 页 ASTM d6641标准电子版 星级: 8 页 ASTM F1978-17(电子版) 星级: 5 页 ASTM B62-17(电子版) 星级: 3 页 ASTM B873-17(电子版) 星级: 3 页 AS...
内容提示: Designation: E1050 − 19Standard Test Method forImpedance and Absorption of Acoustical Materials Using aTube, Two Microphones and a Digital Frequency AnalysisSystem 1This standard is issued under the f i xed designation E1050; the number immediately following the designation indicates the...
Designation: E 1050 – 98 Standard Test Method for Impedance and Absorption of Acoustical Materials Using A Tube, Two Microphones and A Digital Frequency Analysis System1 This standard is issued under the ?xed designation E 1050; the number immediately following the designation indicates the year ...
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11 表示硫系易切削结构钢, 12 13、表示硫磷复合易切削结构钢,12L表示铅硫复合易切削结构钢。合金结构钢 1330E9310 和硼钢 50B4494B30 共 90 个牌号。牌号前两位数字的代表钢类均符合 SAE 系统规定。弹簧钢 1050 碳素弹簧钢、 5160 合金弹簧钢和含硼弹簧钢 51B60 等均分别属于碳素钢和合金结构钢标准。以上...
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