yacht keel of lead

• 游艇龙骨；铅制

yacht keel of lead的用法和样例：

例句

1. Lead cups were used to drink ale or whiskey.
   铅制的杯子用来喝麦芽酒或威士忌。
2. The green cresset is the mark of lead free processing.
   绿色灯号是无铅制程标识。