ductibility

Refer to the ductibility and light-weight which improved the construction more safe reliability.

钢结构延好，自重轻、大大提高了住宅的安全可靠。

But geosytheic of ductibility is large, the rough edge effect to a non-cutting and drilling operations.

但分解质料的延展较大，感化到毛边的裁切和打孔操纵。