To assure interchangeability in such instances, users may wish to ascertain functional equivalence or determine such characteristics before use.
为确保上述情况的互换性，使用者应在使用前确定互换前后功能等效或测定上述特性。
To assure interchangeability in such instances, users may wish to ascertain functional equivalence or determine such characteristics before use.
为确保上述情况的互换性，使用者应在使用前确定互换前后功能等效或测定上述特性。
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