I remembered clearly that the explanations of 3♠ are "Good ♦ support -....."(Sorry,I forgot that following explanations)
However I checked it again after finished this hand,I found Gib have changed the meanings of 3♠.
Now I had no evidence,but please believe what I said,check its bidding sequences again.
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P.S.
Until I wana to post my thread,there are 9 Gib hands in total.
1- There are 6 hands with similar bidding,for example:
2- There is 1 hand,it goes:
3- There is 1 hand,it goes:

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