基本解释[经济学]千斤顶支座英汉例句双语例句The utility model provides a jacking device for the assembly of a front bracket.本实用新型提供一种前托架装配顶升装置，包括：支架；ip.com词组短语短语jacking -up bracket 顶升托架专业释义经济学千斤顶支座