unit sand造句

例句与造句

1. The effective cost dust content of molding sand should be determined according to time factors such as the quality of the coal dust , casting size and thickness , pouring temperature , lacing sand or unit sand , and so on
   决定型砂中的有效煤粉含量应根据煤粉质量的优劣、铸件大小和厚薄，浇注温度、面砂或单一砂等因素。
2. It's difficult to find unit sand in a sentence. 用unit sand造句挺难的