计算机硬件 输入输出设备 释文 line scanning 行扫描
- focusing factor
- focusing foil
- focusing geometry
- focusing glass
- focusing glass measuring distance
- focusing hood
- focusing knob
- focusing lens
- focusing magnet
- focusing magnetic field
- focusing magnifier
- focusing method
- focusing mount
- focusing of sound
- focusing on infinity
- focusing optics
- focusing range
- focusing reflector
- focusing ring
- focusing scale
- focusing screen
- focusing screw
- focusing solenoid
- focusing X-ray telescope
- focusing γ-ray telescope