n. 德国银；洋银；铜镍合金
1.Air cooler and oil cooler shall be made of red copper, albata seamless tube or other corrosion prevention tubing.
3空气冷却器和油冷却器应采用紫铜、铜镍合金的无缝管或其他防锈蚀的管材。
2.Air cooler and oil cooler shall be made of red copper, albata seamless tube or other corrosion prevention tubing.
3空气冷却器和油冷却器应采用紫铜、铜镍合金的无缝管或其他防锈蚀的管材。