短語詞組短語butt -end 樹干基端butt weld end 對(duì)頭式焊接頭butt elded end 對(duì)焊端;對(duì)于焊端butt welded end 對(duì)焊端;坡口端;對(duì)于焊端Butt -End Diameter 根頸徑Flat butt -end seam 對(duì)接縫頭diameter at butt -end 干基直徑 返回 butt end