| 摘要 |
PCT No. PCT/US79/00090 Sec. 371 Date Feb. 15, 1979 Sec. 102(e) Date Feb. 15, 1979, PCT Filed Feb. 15, 1979, Ser. No. 30,244. A router bit assembly for an earth working apparatus (10, 12) including earth working means having a generally horizontally elongated blade (18) with a generally vertically extending side member (22) at at least one end of the blade, a relatively tall router bit (32) formed of plate metal extending along the side member and in proximity to the blade, a relatively short support (34) for the router bit interposed between the router bit and the side member and having a first lip (36) overlying and substantially abutting the upper extremity (38) of the router bit and a second lip (40) underlying the lower extremity (30) of the side member, and removable bolts (50) securing the router bit and the support to the side member. |
