短語(yǔ)詞組短語(yǔ)concentric -ring 同心環(huán)Concentric -ring circular bar code 發(fā)明名稱concentric slip ring [電]同心滑環(huán)concentric piston ring detail 同心活塞環(huán)Four concentric -ring micro-crystallite patterns 四同心環(huán)微晶體結(jié)構(gòu) 返回 concentric ring