Precoated
(precoat 的过去时) (在过滤器表面涂敷的)滤料层
🗣️ 情景例句
Yes. Those are excellent gifts. Who else do you need to buy for?
当然，这是都是最佳礼物。你还需要买给谁？
What do you recommend?
你推荐什么？
The tunnel would be well-ventilated if tall chimneys were built above sea level.
隧道就具备了良好的通风条件。