concentric ring
短語詞組
- 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)微晶躰結(jié)搆 返回 concentric ring