The phrase "a continuous reduction in" is correct and usable in written English.
It can be used when discussing a consistent or ongoing decrease in a particular quantity or quality over time.
Example: "The company has experienced a continuous reduction in costs since implementing the new efficiency measures."
Alternatives: "an ongoing decrease in" or "a steady decline in".
For the metal-working industry, a continuous reduction in manufacturing cost is desirable.
However, establishing an environment for a continuous reduction in the speeding violations has been a challenge in many countries.
The addition of RHA to both the Okitipupa (SW) and Enugu (SE) shale caused a continuous reduction in PI up to 10 % RHA.
A continuous reduction in the cross-section area is analysed as a means of improving mass-transfer in a parallel-plate electrochemical reactor.
In contrast, a continuous reduction in ProPO/granular cell ratio was observed in shrimp fed with glucans, revealing that with this type of immunostimulant, shrimp drive their immunological equipment to respond continuously to the stress.
The incorporation of W in the Ni–W solid solution at low W compositions results in a continuous reduction in crystallite size, a small cathodic shift in corrosion potential, and a small reduction in corrosion resistance.
Extraction of the modal characteristics revealed a continuous reduction, of approximately 5%, in the first three natural frequencies over the period of the study.
However, a strong, continuous reduction in the EOF occurred and quantification was not possible.
In subsequent years a continuous reduction of sequestration rates was observed, which is assumed as a consequence of the recovery of the timber market.
3 Large scale clinical trials examining the efficacy of a broad range of antihypertensives found a consistent and continuous reduction in cardiovascular risk (primary or secondary events and across all age groups) according to the baseline values and magnitude of change in both systolic and diastolic blood pressure.
Finally, the data for Mexico indicate a slow, although continuous, reduction in income inequality since the early 1990s.
