| 摘要 |
A router for cutting an L-shaped groove in elongated frame members adapted to have their ends joined in L-shaped assembly by an L-shaped bracket. The router comprises an elongated cutter stem (102) having an axis (103) about which the stem is rotatable, the stem having substantially parallelogram cross sections in planes normal to that axis, and a cutter head (106) at the end of the stem and integral therewith, the head also having substantially parallelogram cross sections in planes normal to that axis. |
