イリジウムスパークプラグvsプラチナを使用する。
2012/12/28 Click：
Iridium spark plugs vs Platinum.
Compared to platinum, iridium is more durable and sturdier, with a melting point of 700 degrees. Iridium spark plugs feature exceedingly fine electrodes and can retain impressive wear characteristics. As to its strength, iridium spark plugs last longer than platinum spark plugs by 25%.
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