<p>An apparatus for discharging material excavated by an air assisted drill is disclosed. The apparatus has a housing adapted to rest upon and seal against the ground and through which a drill stem may pass. A discharge conduit communicates with the housing and extends from the housing and terminates at a discharge outlet.</p>
申请公布号
WO9733071(A1)
申请公布日期
1997.09.12
申请号
WO1997AU00134
申请日期
1997.03.06
申请人
DOBSON, GEORGE, MICHAEL, RICHMOND;DOBSON, AUSTIN, JAMES
发明人
DOBSON, GEORGE, MICHAEL, RICHMOND;DOBSON, AUSTIN, JAMES
