30. reliability n.可靠性 31. scan.扫描 scanner扫描仪 Types of scanner flatbed scanner平板式扫描仪 feed scanner送纸扫描仪 drum scanner鼓式扫描仪 handheld scanner手持式扫描仪 32 sensor传感器10 30. reliability n. 可靠性 31. scan v. 扫描 scanner 扫描仪 Types of scanner： flatbed scanner 平板式扫描仪 feed scanner 送纸扫描仪 drum scanner 鼓式扫描仪 handheld scanner 手持式扫描仪 32. sensor 传感器