bar
(1)杆，棒，条
(2)档板
(3)巴(压强单位，即106达因∕厘米2)

• pumping tube
• pumping wave
• pumping waveform
• pump intensity
• pumpiung source
• pump light
• pump lighting
• pump light source
• pump linewidth
• pump modulation
• pump photon
• pump power
• pump-power chart
• pump-power modulation
• pump pulse duration
• pump rate distribution
• pump reflector
• pump stauration in optical parametric oscillators
• pump transition
• pump transition probability
• punch
• punched card
• punched paper tage
• puncher
• punctrue