undercut gage的相關資料：
臨近單詞
undercut
undercutting under shallow cover
undercut-and-fill mining method
undercutting with shallow overburden
undercutting under shallow overburden
undercutting in shallow-bedded zone
Undercut relief and lead-in chamfers.
undercutting under super-shallow overburden
undercutting technique of network information
