upper grid plate

例句：

1. 1. The upper gridplate is used to hold the upper partof the machine together.
   上网格板用于将机器的上部固定在一起。
2. 2. The upper gridplate was damaged during the accident.
   事故中上网格板受损了。
3. 3. The engineers were working on theupper grid plate when they heardthe alarm.
   工程师们在修理上网格板时听到了警报声。