pneumatic chipping hammer or scaling hammer ,it is a small, air-powered tool used primarily in industrial settings, metalworking, and masonry - 氣缸結構 幅插畫檔、美工圖案、卡通及圖標
history, engineering, industrial, plan of cylinder of a steam engine, vintage illustration 19th century 1880s - 氣缸結構 幅插畫檔、美工圖案、卡通及圖標