1. A ferrule and eraser are crimped into place on each pencil. 金属环把橡皮头固定到每一根铅笔上。
2. The ferrule of heat insulation tube was seriously corroded in short time under the conditions of injecting steam into the oil well. 某采油厂在实施油井注蒸汽解堵过程中，隔热管接箍在短时间内发生严重腐蚀。
3. A new complex ferrule fine-blanking technology, combined with the idea of ferrule punching, is introduced in the researching on the pressure rotor and fender ring in this paper. 本文以油泵增压转子/挡圈为研究对象，结合套冲工艺思想，在精密冲裁中引入复合型精密套冲新工艺。
英英解释
n.
1. a metal cap or band placed on a wooden pole to prevent splitting
