high-low technique

例句：

1. 1. The high-low technique is a method used in the production of metal castings.
   高低技术是一种用于金属铸件生产的工艺方法。
2. 2. In the high-low technique, the molten metal is poured into a mold and allowed to solidify at different temperatures.
   在高低技术中，熔融金属被倒入模具中，并在不同温度下凝固。
3. 3.The high-low technique has been widely used in the manufacturing industry for its efficiency and precision.
   高低技术因其效率和精确性而被广泛应用于制造业。