hoisting block（起重滑车）是什么意思？音标发音+图解场景

起重滑车 /ˈhɔɪstɪŋ ˈblɒk/ n

English: hoisting block · 起重滑车

释义：System of pulleys that work with the trolley pulley to improve leverage to lift heavy loads.

这个词出现在以下图解场景（1）