例句與造句

1. Life is the main factor restricting air valve and spring - loaded valves quality , the general long - term continuous operation of the compressors to life 80 hours ; for mobile , short - term or intermittent operation of compressors , may require slightly more
   限制氣閥壽命的主要因素是閥片及彈簧質量，一般對長期連續(xù)運轉的壓縮機，希望壽命達8000小時以上；對移動式、短期或間歇運轉的壓縮機，要求可稍低些。
2. It's difficult to find spring-loaded valve in a sentence. 用spring-loaded valve造句挺難的