基本解释[机械工程]湿砂心型英汉例句双语例句Green-sand is easy to prepare by mixing and needs no treatments after formation. It can be poured immediately after core setting.湿型砂混制简单，成型后不需要任何处理，下芯后可浇注。green sand core更多例句专业释义机械工程湿砂心型