flame emission spectroscopy
旗标

• recon device
• reconfigurable
• reconnaissance camera
• reconnaissance device
• reconnaissance equipment
• reconstructed image
• reconstructing hologram
• reconstructing wave
• reconstruction beam
• record
• recordability
• record chart
• record circuit
• recorder
• recorder deflection
• recorder-pen
• recorder scan
• recording camera
• recording colorimeter
• recording equipment
• recording infrared spectrophotometer
• recording infrared tracking instrument
• recording instrument
• recording lamp
• recording medium