light-ray control的用法和樣例：
例句
- Photocell control, even feeding quantity, accurate machine-hour output, matches with the high-speed card.
光電控制給棉量均勻準確，台時產量配合高速梳理機。 - It adopts photoelectrical cell control winding and unwinding,has a high precision in printing.If lost sign,machine will stop automatically.
使用光電控制放料和收卷，色標光電跟蹤使彩印圖案準確，丟標自動停機。
