又是怎样来确定有效期限和交单期限？
And what about the term of validity or period for presentation?
交单期21天，我们不会拖延交单，自己给自己制造不符点。
The period of presentation is 21 days, we will not delay and make any discrepancy.
交单期21天，我们不会拖延交单，自己给自己制造不符点。
The period of presentation is 21 days, we will not delay and make any discrepancy.
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