例句與造句

1. A visual check of air gaps is sufficient , but mechanical backflow preventers have to be tested with properly calibrated gauge equipment
   盡管安裝氣隙足夠目視觀察，但是機(jī)械式防回流閥還是必須用適當(dāng)量程的儀表設(shè)備進(jìn)行檢測(cè)。
2. It's difficult to find calibrating gauge in a sentence. 用calibrating gauge造句挺難的