roof jack meaning in English
顶板螺旋千斤顶
临时钢支柱
液压顶柱
Examples
- Roof jacks for manufactured homes and recreational vehicles
装配式房屋和旅游车用顶棚支柱 - Speech by scit , mr john tsang at the roof jack - up ceremony of asiaworld - expo : english only
工商及科技局局长曾俊华在如何在中国有效保护商标品牌研讨会上的致辞全文：只有中文