silent-mesh gearbox

例句：

1. 1. The silent-mesh gearbox is designed to improve efficiency in heavy machinery.
   这种无声网状变速箱旨在提高重型机械的效率。
2. 2. The engineer had to replace the silent-mesh gearbox due to wear and tear.
   由于磨损，工程师不得不更换这个无声网状变速箱。
3. 3. The new model of silent-mesh gearbox has been introduced to the market, offering improved performance.
   新型无声网状变速箱已上市，性能有所提升。