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2013-05-23 12:21
求翻译：During production, these determinations shall be carried out at least once a day. These requirements are insufficient to ensure that the Standard sand is equivalent to the Reference sand. Such equivalence is maintained by a certification testing programme comprising comparison of the Standard sand with the Reference sa是什么意思？ 待解决
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During production, these determinations shall be carried out at least once a day. These requirements are insufficient to ensure that the Standard sand is equivalent to the Reference sand. Such equivalence is maintained by a certification testing programme comprising comparison of the Standard sand with the Reference sa
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