The nine brush makers each have 27 years of experience, on average.

九位制刷师平均每人拥有 27 年的经验。

To achieve this, the company needed skilled brush makers.

为实现这一目标，该公司需要熟练的刷子制造商。

And the skilled brush makers can effortlessly separate between 28- and 32-millimeter-length hairs just with their hands.

技艺精湛的制刷师只需用手就能毫不费力地分离 28 至 32 毫米长的毛发。

It takes three years to train, and there are only nine brush makers in the world that can make these top-of-the-range Series 7 brushes.

培训需要三年时间，世界上只有九家刷子制造商可以制造这些顶级系列 7 刷子。