短語詞組短語grating g constant 光柵常量ultrasonic grating constant 超聲光柵常數;超聲光柵diffraction grating constant 光柵常數Adjustable grating constant 可控光柵常數grating constant measuring 光柵常數測試equivalent Grating Constant 等效光柵常數constant of grating 光柵常數 返回 grating constant