用途：通过犁破漆膜的铅笔硬度等级测定漆膜硬度。
Purpose: This machine is used to test film hardness through the pencil hardness of plow-breaking paint film pencil.
虽然钻石是10硬度等级，它被认为是靠不住的，将破坏对尖锐的影响。
Though Diamond has a hardness rating of 10, it is considered to be brittle and will shatter on sharp impact.
试验研究表明，合理的砂轮磨料和硬度等级、合理的磨削用量、高效磨削液和CBN砂轮将有效地避免钛合金的磨削烧伤和磨削裂纹。
The experimental studies demonstrated that reasonable abrasive and hardness grade of wheel, grinding parameter, high efficiency grinding fluid and CBN wheel will avoid effectively th...
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