背面点接触太阳电池
point contact concentrator (PCC) solar cells
薄壁四点接触球轴承
thin walled four point contact ball bearing
刀具接触点
Cutter contact points
cc-point inverse tool offset
点接触钢丝绳
point contact lay steel wire rope
point contact lay wire rope
点接触合金台面型晶体管
dot alloy mesa transistor