depressed die pad是什么意思

用法例句

The article based on fabrication process of the pre-heater which is the equipment of hydrogen manufacturing unit,and the forming of Cr-Mo steel coil and welding gasket was analyzed.

通过制氢装置中的设备——原料预热器的制作,介绍了铬钼钢螺旋盘管和焊接垫片的成型及焊接、无损检测等工艺过程,实现了此类产品的国产化,并为类似产品的制造提供了借鉴。