casting sprue former

例句：

1. 1.The casting sprue former is critical to the success of the casting process.
   铸造模芯前身对于铸造过程的成功至关重要。
2. 2.The engineer used a new casting sprue former to improve the quality of the castings.
   工程师使用一种新的铸造模芯前身来提高铸件的质量。
3. 3. The company has been using this casting sprue former for years, and it has proven to be very effective.
   该公司多年来一直使用这种铸造模芯前身，并且证明它非常有效。