| 释义 |
sack rub sack rub, sack finishA finish for formed concrete surfaces; designed to produce even texture and fill all pits and air holes; after the surface is dampened, mortar is rubbed over it; then, before it dries, a mixture of dry cement and sand is rubbed over it with a wad of burlap or a sponge-rubber float to remove surplus mortar and fill voids. |