projection equipment

例句：

1. 1. The new projector is much more powerful than the oldone.
   这款新投影机比旧的强多了。
2. 2. The teacher used a projectorto demonstrate the math problem.
   老师用投影仪来演示那个数学问题。
3. 3. The companyhas invested heavily in the development of newprojection equipment.
   该公司在开发新型投影设备上投入了大量资金。