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2013-05-23 12:21
求翻译：Before using for abrasion test, the abrasive grade must be lowered to a value of less than 220 mg by one or two runs with a steel test piece, followed by careful cleaning, and two runs with the standard comparison rubber ( see D-5.3 ). With an emery-cloth of an initial abrasive grade of 210 mg to 220 mg a few hundred t是什么意思？ 待解决
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Before using for abrasion test, the abrasive grade must be lowered to a value of less than 220 mg by one or two runs with a steel test piece, followed by careful cleaning, and two runs with the standard comparison rubber ( see D-5.3 ). With an emery-cloth of an initial abrasive grade of 210 mg to 220 mg a few hundred t
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