stock line in the furnace

例句：

1. 1.The engineer carefully adjusted the stock line to ensure optimal heat distribution.
   工程师小心翼翼地调整了炉内支撑线，以确保最佳的热量分布。
2. 2.During the welding process, it's crucial to maintain a stable stock line to prevent the molten metal from flowing out of the joint.
   焊接过程中，保持稳定的炉内支撑线至关重要，以防熔融金属从接头处流出。
3. 3. The stock line is an essential component that helps guide the flow of gases and materials through the furnace.
   炉内支撑线是一个重要的组件，它引导气体和物料通过炉膛。