This deal is adapted from a duplicate at Bramhall and Cheadle.
After a routine auction, you play in three notrump on the lead of the spade seven.
You play the king, East wins with the ace and returns a spade. You now play the jack of diamonds which West takes with the ace and returns a club to the ten and king.
If either minor suit plays for four tricks you now have the rest, if not it is likely that each opponent guards one minor and they will each be squeezed in hearts and the minor.
A plausible line of play is cash the remaining spades throwing hearts from dummy, East can afford to throw one heart. Then cash another top club, leading to the position below. When a club is played to the ace East has to hold the diamonds, so must relinquish her heart guard. Now a diamond to the queen and another diamond puts pressure on West. She must hold on to the jack of clubs, so must also give up the heart guard. Now declarer makes three heart tricks.
This is a non-simultaneous double squeeze.
At the table, unfortunately for squeeze technicians, West held A10 doubleton of diamonds, so eleven tricks were easy.