挪威航空的行李问题

买挪威航空 low fare的票子，除了10kg的随身行李，免费托运的行李有多少？
下面的说明好像没有提。

Hand Baggage is included. Each passenger can bring 1 piece free of charge. Maximum weight is 10 kg on lowfare flights and 15 kg on fullflex flights. Maximum dimensions are 55 x 40 x 23 cm.
Checked Baggage is calculated per bag per flight. Full flex tickets include 1 bag free of charge.
Checked luggage is limited to 2 pieces at maximum 20 kg each for each traveler. Extra fees will be charged for additional luggage or for overweight. Fees start at