spring-steel shutter
常见例句
- In this shutter, the mechanism of switch on-off light beam is a pair of steel plates which are controled by two electromagnets that overcome the force of spring fixed on the shutter.
在这种快门中，开关光路的机构是一对由电磁铁控制的，以弹簧为动力的薄钢片。 返回 spring-steel shutter