shrinkagen.收缩；减少；损失；损耗Shrinkage casty缩孔shrinkage front收缩线shrinkage ratio收缩率,收缩比shrinkage level收缩程度shrinkage curve收缩曲线shrinkage stope留矿采矿工作面,留矿回采工祖,留矿采矿场shrinkage gauge缩尺,收缩尺度shrinkage joint收缩缝shrinkage angle收缩角shrinkage index收缩指数