Ferrous tool materials have iron as a base metal and include tool steel, alloy steel, carbon steel, and cast iron.
黑色工具材料以铁为基材，包括工具钢，合金钢，碳钢，铸铁。
The effects of it on the carbon content of the iron base structure materials were studied.
研究了它对铁基结构材料碳含量与性能的影响；
Many natural substances of base materials are used to make activated carbon.
许多天然物质的基础材料是用来制造活性炭。
Many natural substances of base materials are used to make activated carbon.
许多天然物质的基础材料是用来制造活性炭。
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