photosensitivity
光敏性，感光性，感光灵敏度

• film tansporting system
• film thickness
• film thickness gauge
• film thickness measuring
• film thickness measuring device
• film thickness meter
• film thickness monitor
• film velocity
• film weld
• filter
• filter action
• filter by means of vacuum
• filter by suction
• filter capacity
• filter cartride
• filter circuit
• filter deffect
• filter discrimination
• filtered air
• filtered beam
• filtered image
• filter element
• filter factor
• filter fator
• filter gauze