What does barrel strength mean?

Barrel strength

The strength of the barrel; Original wine; Open barreled bottle

Interpretation from the Internet

1.

Barrel strength

According to the history of British winemaking, in the17th century, British winemakers made oak barrels of different sizes to resist the malt tax imposed by the government.

2.

Unsweetened

Shi Yu is 52% Shirley barrel in 20 years. It is not the original wine (barrel strength), but it is very close to the appearance of the original wine (low dilution). Shi Yu has been a typical Japanese Shirley bucket for 20 years. More expensive than Yamazaki 18y …

3.

Open barreled bottle

In order to open the barrel, the aromatic alcohol in the original barrel is retained. ... [full text]