短語詞組短語shrinkage hole and slack 縮孔縮松shrinkage hole porosity 縮孔reduction shrinkage hole 還原收縮孔shrinkage hole and shrinkage marks 縮孔縮痕hole shrinkage 縮徑;井眼縮徑shrinkage stoping with shallow hole 淺孔留礦shrinkage stoping with short hole 淺孔留礦法shallow hole shrinkage method 淺孔留礦法shallow -hole shrinkage 淺孔留礦法 返回 shrinkage hole