The copper deposit also represented higher microhardness and better corrosion resistance.
电铸铜的显微硬度和抗腐蚀性能均明显提高。
Special lead calcium alloy makes better corrosion resistance and higher recovery capacity.
使用特殊的铅钙合金，更耐腐蚀，充电接受能力更好。
The utility model is suitable for heating of water heating with better corrosion resistance.
适宜于水暖气的采暖，具有较强的耐腐 蚀性能。
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