| 摘要 |
A manually operable and steerable curb extrusion device for extruding curb, barrier, wall, gutter or the like from concrete, cement or some other moldable building material. The curb extrusion device has a hopper into which building materials are placed to fall onto a reciprocating orbital compaction member which compacts, kneads, and forces the building material through an open ended extrusion mold where it is shaped before extrusion.
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