hole enlarger 中文意思是什麼
hole enlarger
解釋
擴孔器-
Abstract : in order to enhance the ability of two types of enlarger which isused to enlarge the hole under oil layer casing, their structure, material and machining technology were improved. the result and technical index have been proved satisfactory by site application
文摘:為了提高油層套管下面擴孔用的三牙輪及同步式2種擴孔器的擴孔能力，對它們的本身結構、材料及製造工藝等做了改進，研製了功能更好的擴孔器，經現場實際使用達到了滿意的效果，技術指標達到設計要求。
分享友人