This shutterdevice for fading a picture can be operated by hand.
这个使画面惭入的遮板装置可以用手操作。
2
It extensively be used for UV lamp's reflection, and can book aluminum alloy's all mirror reflection cover and on-line shutterdevice reflect cover, in it contain import reflected light piece.
广泛用于UV灯的反射，可订做铝合金全镜面反射罩和联机快门装置反射罩，内含进口反光片。
3
This device screws into the shutter release button.