crucible base block

例句：

1. 1.The scientist used a crucible to melt down the gold bars.
   科学家用坩埚熔化了金条。
2. 2.The engineer designed a new crucible block for the machine.
   工程师为机器设计了一个新的坩埚基块。
3. 3.The metallurgist tested the crucible base block for strength and durability.
   冶金学家测试了坩埚基块的强度和耐用性。