ferrules的音标：...

n.（棍棒顶端等的）金属箍，金属环，套圈( ferrule的名词复数 )...

Compression fittings for attaching tubing ( piping ) commonly have ferrules ( also known as olives ) in them.为附加管 ( 管道 ) 通常有 ( 也称为橄榄在其中 ) 冷压头压缩配件....