Cast metallic matrix self-lubricating composites, which possess excellent antifriction, wear resistance, damping capacity, etc., have been investigated extensively.
铸造金属基自润滑复合材料具有良好的减摩、耐磨与减震性能，因而人们正在进行广泛的研究。
A time relay is used to accurately control the capacity of the injected lubricating grease, and therefore, the overflow phenomenon of the lubricating grease can not happen.
用时间继电器精确控制润滑脂加注量，不会出现润滑脂溢出现象。
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