alloying tin with copper to make bronze.
将锡和铜熔合铸青铜。
alloying tin with copper to make bronze.
将锡和铜熔合铸青铜。
The conversion film is probably constituted of amorphous and pored alloying tannate chelate.
这种转化膜很可能由有一定孔隙的非晶态合单宁酸膜层构.
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