nyg是什么意思

意思是液压螺母

例句Coating of cobalt on surface of ultra-fine WC particle to form WC-Co composite powder was carried out by low temperature electroless plating. The WC-Co composite powder was sintered into a new type of ultra-fine WC-Co cemented carbide ( NYG).采用低温化学镀方法在超细WC颗粒表面进行金属钴包覆，烧结包覆后的复合粉体制备新型硬质合金NYG（WC-3%Co）。