刃具; 刀具; ★器械; 方法; 手段; 量具(Such high-carbon steels are not so much used in engineering as steels with low and medium carbon content, though tools and other instruments which are required to be very hard have carbon contents up to 1.5 per cent. 虽然工具和仪器需要很高的硬度,其含碳量高达1.5%,但是如此高含碳量的钢在工程上的使用量远不如低碳钢和中碳钢多。)