按打包装铅笔 pack pencils in dozens

按打出售 sell by dozen

按需打印 Print on demand ; OTP On Demand Print ; POD

按打出售货物 by the tally

打开按钮 Push the button ; Open button ; Case "open

等于按下打印键 PRINT SCREEN

按指法打 touch-type

按份打印 Press print ; Copies printed by ; Click the print