This heirloom has been handed for several generations.
此項產業已經數代相傳了.
?? 聯想助記
【記】heir-繼承人,loom-織布機:繼承人得到的傳家寶是織布機
?? 牛津釋義
heirloom
n
(usu valuable) object that has been handed down in a family for several generations (通常為貴重的)祖傳遺物, 傳家寶
That clock is a family heirloom. 那個座鐘是祖傳下來的.