23:51 May 29, 2013 |
English to Arabic translations [PRO] Tech/Engineering - Metrology / علم القياس | |||||
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| Selected response from: Ahmed Ahmed Saudi Arabia Local time: 09:27 | ||||
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4 +1 | مستوى/معدل الضجيج |
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1 +1 | Natural rubber المطاط الطبيعي |
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nr مستوى/معدل الضجيج Explanation: http://www.safety-eng.com/phiz-haz.htm http://www.unc.edu/~rowlett/units/dictN.html The noise rating (NR) system was introduced by Kosten and van Os in 1962. Numerically, the NR rating is equal to the sound level in decibels at a frequency of 1000 hertz, but the rating requires lower levels at the more objectionable higher frequencies. http://www.aawsat.com/details.asp?issueno=9165&article=22349... |
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nr Natural rubber المطاط الطبيعي Explanation: رجاء كتابة السياق كاملاً إذا كان ذلك ممكنًا -------------------------------------------------- Note added at 3 hrs (2013-05-30 03:37:05 GMT) -------------------------------------------------- http://business.highbeam.com/438330/article-1G1-12408445/nat... The main polymers used for tires are as follows: 1. Natural Rubber (NR). 2. Styrene Butadiene Rubber (SBR). 3. Butadiene Rubber (BR). 4. Isoprene Rubber (IR) ... www.energyjustice.net/files/tires/files/TTT_06.pdf |
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