back-up plate的用法和樣例：
例句
- This article presented a teaching experimental platform on general measurement and selected mating about the roller bearing pretension backup plate.
介紹了一種以滾動軸承預緊墊片綜合測量選配為主的教學實驗平台。 - This paper presents a welding machine back of the design, namely a welding torch can be synchronized with the mobile pads car.
本文主要介紹了一種自動焊背面成型機的設計，即一種可以實現跟隨焊槍同步移動的墊片小車。
