spring housing（弹簧套）是什么意思？音标发音+图解场景

弹簧套 /ˈspɹɪŋ ˈhaʊzɪŋ/ n

English: spring housing · 弹簧套

释义：Casing protecting the spring that keeps the cord and pulley under tension.

这个词出现在以下图解场景（1）