The silver-tungsten and silver-nickel graphite concocts with high properties pre-sintered tungsten skeleton have been made through a lot of experiments.
通过大量试验，制成了高性能预烧钨骨架银钨触头和银镍石墨触头。
The silver-tungsten and silver-nickel graphite concocts with high properties pre-sintered tungsten skeleton have been made through a lot of experiments.
通过大量试验，制成了高性能预烧钨骨架银钨触头和银镍石墨触头。
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