3 Air cooler and oil cooler shall be made of red copper, albata seamless tube or other corrosion prevention tubing.
3空器和油器应采用紫铜、铜镍合金的无管或其他防锈蚀的管材。
3 Air cooler and oil cooler shall be made of red copper, albata seamless tube or other corrosion prevention tubing.
3空器和油器应采用紫铜、铜镍合金的无管或其他防锈蚀的管材。
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