plus
(1)正号
(2)加号
(3)正数
(4)正的
(5)加

• gold-doped
• gold flaser
• gold foil
• gold leaf electroscope
• gon
• gonimeter eyepiece
• goniometer
• goniometer eyepiece
• goniometry
• goniophotometer
• goniophotometric curve
• gonioradiometer
• Gonioscopic prism
• go-no-go gauge
• gonometric
• Gotar lens
• gradation
• grad criteria
• grade
• graded coating
• graded deposit
• graded index
• graded-index glass fiber
• graded-index potical fiber
• graded-index potical waveguide