例句與造句

1. PA Boeing Co ., Ridley Park, won a $ 242, 153 contract from the U . S . Navy for plain bearing units.
2. Lord Corp . of Erie won a $ 191, 310 contract from the U . S . Army in Redstone Arsenal, Ala ., for plain bearing units.
3. It's difficult to find plain bearing unit in a sentence. 用plain bearing unit造句挺難的