ECE regulations
Unofficial summary of ECE regulations
29 November 2010
ECE R117.02 corrigendum 1
R117.02 タイヤ単体騒音 修正
Tyre rolling noise, wet grip adhesion and rolling resistance, correction
http://www.unece.org/trans/doc/2010/wp29/ECE-TRANS-WP29-2010-146_e.pdf
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