sandwichingn.夹层铺料sandwichn.三明治vt.插入；夹在中间sandwich explosive平面夹层炸药sandwich type cell多层型电池sandwich laminated夹芯式sandwich structure夹层结构sandwich structers夹层结构sandwich component夹层构件sandwich saw blades三明治锯片sandwich panel cell多层板壳单元sandwich thin films三明治薄膜sandwich phenomenon“夹心”现象