fixed roller造句

例句与造句

1. Fixed roller dams are generally made from reinforced concrete or masonry.
2. With the cable lifted into the jaws, the operating lever is pulled back, forcing the jaws between two fixed rollers, and capturing the cable between the grip's replaceable mild-steel dies ( but without applying pressure ).
3. It's difficult to find fixed roller in a sentence. 用fixed roller造句挺难的