例句與造句

1. This roller carriage was a weight-driven machine which had to be rewound manually to lift the weight whenever it reached the base.
2. A 2nd Order optic was mounted on a roller carriage to allow for smooth rotation . ( The Order is a system of classifying the type of lenses used based on the focal length of the lens ).
3. It's difficult to find roller carriage in a sentence. 用roller carriage造句挺難的