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6.2.2 娌栨搳鎬ц兘
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6.2.2.3 灏�(du矛)浜嶫2鍜孠2鍏ū鍘氬害 < 6mm鐨勭敘(ch菐n)鍝侊紝閻电礌楂旀櫠绮掑害3 6锛屽鏋滆▊璨ㄦ檪(sh铆)鏈夎(gu墨)瀹�锛屾寜EN ISO 643涓弿杩扮殑鏂规硶閫�(j矛n)琛屾椹�(y脿n)銆�
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