design of grooves

• 孔型设计

design of grooves的用法和样例：

例句

1. Presented in the paper are the unique advantages of the said MPM and a cursory review on groove design of the mill.
   介绍了少机架限动芯棒连轧管机组的独特优点，并对其孔型设计进行了初步探讨。