例句與造句

1. Pressure control spring
   壓力控制彈簧
2. Model sxb 430 book sewing machine adopts stepless change device , central lubricating system , parallel control spring for sewing frame and has safety guards on all moving parts
   該機采用無級調(diào)速裝置，集中潤滑系統(tǒng)和訂書架的平衡控制，運動部位均設(shè)有安全防護罩，故機器運裝平穩(wěn)，噪音低。
3. It's difficult to find controlling spring in a sentence. 用controlling spring造句挺難的