铜钢试样特别是良好的，因为一般钢材腐蚀剂不会攻击铜。
Copper is especially good for steel specimens since the usual etchants for steels will not attack the copper.
彩色显象管电子枪零件一般由不锈钢材料制成，具有较高的硬度和强度。
Electron gun accessories of color kinescope are made of stainless steel which has high hardness and intensity.
镀锌对于一般结构钢材之机械性能不会产生任何影响。
The mechanical property The mechanical properties of commonly galvanized steel are not significantly affected by galvanizing.
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