tough steel

基本解释

Mechanically speaking, silk fibers are as tough as steel.
技术上讲，丝纤维的强韧度堪比钢铁。
Tough universal steel tool box that can fit most tractors.
这是一种牢固多功能的工具盒，可在大多数拖拉机上使用。
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The paper states a liner plate of ball mill that is melted into an whole body with wear-resisting high chromium cast iron and high tough carbon steel by vertical cast.
本文介绍了采用立浇工艺将高硬度高耐磨性的高铬铸铁和高韧性的优质碳素钢有机地熔融为一个整体，制成双金属复合球磨机衬板。

Anna consists of ten segments containing angle sensors, two valves, and two motors each -- rotating around orthogonal axes and wrapped in a tough steel exoskeleton -- that are controlled by a computer to help her maneuver over numerous types of terrain.
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Weirton went public in 1989 but then bankrupt in 2003 during tough times for the domestic steel industry.
FORBES: OutFront
Rising costs for raw materials like steel and plastic are one reason Chrysler and other automakers had a tough year in 2006.
FORBES: Chrysler For Sale?